diff --git a/icons/icns/make_iconsets.py b/icons/icns/make_iconsets.py
index 9cfba651ef..a60305acca 100644
--- a/icons/icns/make_iconsets.py
+++ b/icons/icns/make_iconsets.py
@@ -17,7 +17,7 @@ sources = {'calibre':j(imgsrc, 'calibre.svg'), 'ebook-edit':j(imgsrc, 'tweak.svg
 if sys.argv[-1] == 'only-logo':
     sources = {'calibre':sources['calibre']}
 
-for name, src in sources.iteritems():
+for name, src in sources.items():
     iconset = name + '.iconset'
     if os.path.exists(iconset):
         shutil.rmtree(iconset)
@@ -44,4 +44,3 @@ for name, src in sources.iteritems():
                     subprocess.check_call(['optipng', '-o7', '-strip', 'all', name])
     finally:
         os.chdir('..')
-
diff --git a/icons/make_ico_files.py b/icons/make_ico_files.py
index 053c204fec..cdd9e6aca2 100644
--- a/icons/make_ico_files.py
+++ b/icons/make_ico_files.py
@@ -17,7 +17,7 @@ sources = {'library':j(imgsrc, 'calibre.svg'), 'ebook-edit':j(imgsrc, 'tweak.svg
 if sys.argv[-1] == 'only-logo':
     sources = {'library':sources['library']}
 
-for name, src in sources.iteritems():
+for name, src in sources.items():
     os.mkdir('ico_temp')
     try:
         names = []
diff --git a/manual/plugin_examples/editor_demo/main.py b/manual/plugin_examples/editor_demo/main.py
index 88b032a563..193b8ef45d 100644
--- a/manual/plugin_examples/editor_demo/main.py
+++ b/manual/plugin_examples/editor_demo/main.py
@@ -78,7 +78,7 @@ class DemoTool(Tool):
 
         # Iterate over all style declarations in the book, this means css
         # stylesheets, <style> tags and style="" attributes
-        for name, media_type in container.mime_map.iteritems():
+        for name, media_type in container.mime_map.items():
             if media_type in OEB_STYLES:
                 # A stylesheet. Parsed stylesheets are css_parser CSSStylesheet
                 # objects.
diff --git a/manual/plugin_examples/interface_demo/main.py b/manual/plugin_examples/interface_demo/main.py
index fa0939de9d..7660ccdb88 100644
--- a/manual/plugin_examples/interface_demo/main.py
+++ b/manual/plugin_examples/interface_demo/main.py
@@ -17,6 +17,7 @@ from PyQt5.Qt import QDialog, QVBoxLayout, QPushButton, QMessageBox, QLabel
 
 from calibre_plugins.interface_demo.config import prefs
 
+
 class DemoDialog(QDialog):
 
     def __init__(self, gui, icon, do_user_config):
@@ -97,7 +98,7 @@ class DemoDialog(QDialog):
         ''' View the most recently added book '''
         most_recent = most_recent_id = None
         db = self.db.new_api
-        for book_id, timestamp in db.all_field_for('timestamp', db.all_book_ids()).iteritems():
+        for book_id, timestamp in db.all_field_for('timestamp', db.all_book_ids()).items():
             if most_recent is None or timestamp > most_recent:
                 most_recent = timestamp
                 most_recent_id = book_id
@@ -152,4 +153,3 @@ class DemoDialog(QDialog):
         self.do_user_config(parent=self)
         # Apply the changes
         self.label.setText(prefs['hello_world_msg'])
-
diff --git a/recipes/brand_eins.recipe b/recipes/brand_eins.recipe
index ee17d573cc..9a6742fb9a 100644
--- a/recipes/brand_eins.recipe
+++ b/recipes/brand_eins.recipe
@@ -112,7 +112,7 @@ class BrandEins(BasicNewsRecipe):
                 {'title': title, 'url': url, 'description': desc})
             self.log('Found article:', title, 'at', url)
 
-        return [(st, articles) for st, articles in feeds.iteritems() if articles]
+        return [(st, articles) for st, articles in feeds.items() if articles]
 
     def get_cover_url(self):
         # the index does not contain a usable cover, but the 'Welt in
diff --git a/recipes/chronicle_higher_ed.recipe b/recipes/chronicle_higher_ed.recipe
index e0a8881e62..566c0bdbd7 100644
--- a/recipes/chronicle_higher_ed.recipe
+++ b/recipes/chronicle_higher_ed.recipe
@@ -76,7 +76,7 @@ class Chronicle(BasicNewsRecipe):
                     if section_title not in feeds:
                         feeds[section_title] = []
                     feeds[section_title] += articles
-        ans = [(key, val) for key, val in feeds.iteritems()]
+        ans = [(key, val) for key, val in feeds.items()]
         return ans
 
     def preprocess_html(self, soup):
diff --git a/recipes/economist.recipe b/recipes/economist.recipe
index 0b9a789a5b..2608db52ed 100644
--- a/recipes/economist.recipe
+++ b/recipes/economist.recipe
@@ -259,7 +259,7 @@ class Economist(BasicNewsRecipe):
                     feeds[section_title] = []
                 feeds[section_title] += articles
 
-        ans = [(key, val) for key, val in feeds.iteritems()]
+        ans = [(key, val) for key, val in feeds.items()]
         return ans
 
     def eco_find_image_tables(self, soup):
diff --git a/recipes/economist_free.recipe b/recipes/economist_free.recipe
index 0b9a789a5b..2608db52ed 100644
--- a/recipes/economist_free.recipe
+++ b/recipes/economist_free.recipe
@@ -259,7 +259,7 @@ class Economist(BasicNewsRecipe):
                     feeds[section_title] = []
                 feeds[section_title] += articles
 
-        ans = [(key, val) for key, val in feeds.iteritems()]
+        ans = [(key, val) for key, val in feeds.items()]
         return ans
 
     def eco_find_image_tables(self, soup):
diff --git a/recipes/epw.recipe b/recipes/epw.recipe
index e67a25f977..1015f195d7 100644
--- a/recipes/epw.recipe
+++ b/recipes/epw.recipe
@@ -78,4 +78,4 @@ class EconomicAndPoliticalWeekly(BasicNewsRecipe):
             sections[current_section].append(
                 {'title': title, 'url': url, 'description': desc})
 
-        return [(t, articles) for t, articles in sections.iteritems() if articles]
+        return [(t, articles) for t, articles in sections.items() if articles]
diff --git a/recipes/gs24_pl.recipe b/recipes/gs24_pl.recipe
index 40edd4c66f..b5e58e6b60 100644
--- a/recipes/gs24_pl.recipe
+++ b/recipes/gs24_pl.recipe
@@ -36,7 +36,7 @@ class AdvancedUserRecipe1322322819(BasicNewsRecipe):
         s = s.group(1)
         replacements = {"0B": ".", "0C": "/",
                         "0H": ",", "0I": "_", "0D": "?", "0F": "="}
-        for (a, b) in replacements.iteritems():
+        for (a, b) in replacements.items():
             s = string.replace(s, a, b)
         s = string.replace(s, "0A", "0")
         return "http://" + s
diff --git a/recipes/history_today.recipe b/recipes/history_today.recipe
index f5c5ae00bd..e536682f35 100644
--- a/recipes/history_today.recipe
+++ b/recipes/history_today.recipe
@@ -58,11 +58,11 @@ class HistoryToday(BasicNewsRecipe):
 
         feeds = OrderedDict()
         section_title = ''
-        for section in div.findAll('div', attrs={'id': re.compile("block\-views\-contents.*")}):
+        for section in div.findAll('div', attrs={'id': re.compile(r"block\-views\-contents.*")}):
             section_title = self.tag_to_string(
                 section.find('h2', attrs={'class': 'title'}))
             sectionbody = section.find('div', attrs={'class': 'view-content'})
-            for article in sectionbody.findAll('div', attrs={'class': re.compile("views\-row.*")}):
+            for article in sectionbody.findAll('div', attrs={'class': re.compile(r"views\-row.*")}):
                 articles = []
                 subarticle = []
                 subarticle = article.findAll('div')
@@ -84,7 +84,7 @@ class HistoryToday(BasicNewsRecipe):
                         feeds[section_title] = []
                     feeds[section_title] += articles
 
-        ans = [(key, val) for key, val in feeds.iteritems()]
+        ans = [(key, val) for key, val in feeds.items()]
         return ans
 
     def cleanup(self):
diff --git a/recipes/lenta_ru.recipe b/recipes/lenta_ru.recipe
index 4072498c9a..efc3d2d444 100644
--- a/recipes/lenta_ru.recipe
+++ b/recipes/lenta_ru.recipe
@@ -126,7 +126,7 @@ class LentaRURecipe(BasicNewsRecipe):
         extractElements = {'div': [{'id': 'readers-block'}]}
 
         # Remove all elements that were not extracted before
-        for tag, attrs in extractElements.iteritems():
+        for tag, attrs in extractElements.items():
             for attr in attrs:
                 garbage = soup.findAll(tag, attr)
                 if garbage:
diff --git a/recipes/liberation.recipe b/recipes/liberation.recipe
index a4340ea5d8..2eb0277220 100644
--- a/recipes/liberation.recipe
+++ b/recipes/liberation.recipe
@@ -65,6 +65,6 @@ class Liberation(BasicNewsRecipe):
         encoding = {'0B': '.', '0C': '/', '0A': '0', '0F': '=', '0G': '&',
                     '0D': '?', '0E': '-', '0N': '.com', '0L': 'http://', '0S':
                     'www.', '0I': '_'}
-        for k, v in encoding.iteritems():
+        for k, v in encoding.items():
             url = url.replace(k, v)
         return url.partition('?')[0]
diff --git a/recipes/orlando_sentinel.recipe b/recipes/orlando_sentinel.recipe
index 39d7246957..cebe4780f7 100644
--- a/recipes/orlando_sentinel.recipe
+++ b/recipes/orlando_sentinel.recipe
@@ -48,7 +48,7 @@ class AdvancedUserRecipe1279258912(BasicNewsRecipe):
                 encoding = {'0B': '.', '0C': '/', '0A': '0', '0F': '=', '0G': '&',
                             '0D': '?', '0E': '-', '0N': '.com', '0L': 'http:',
                             '0S': '//', '0H': ','}
-                for k, v in encoding.iteritems():
+                for k, v in encoding.items():
                     link = link.replace(k, v)
                 ans = link
             elif link:
diff --git a/recipes/phillosophy_now.recipe b/recipes/phillosophy_now.recipe
index ed1c9fcf5f..4c9c7cf298 100644
--- a/recipes/phillosophy_now.recipe
+++ b/recipes/phillosophy_now.recipe
@@ -72,7 +72,7 @@ class PhilosophyNow(BasicNewsRecipe):
                     if section_title not in feeds:
                         feeds[section_title] = []
                     feeds[section_title] += articles
-        ans = [(key, val) for key, val in feeds.iteritems()]
+        ans = [(key, val) for key, val in feeds.items()]
         return ans
 
     def cleanup(self):
diff --git a/recipes/readitlater.recipe b/recipes/readitlater.recipe
index ab1dcbb25a..7729777f74 100644
--- a/recipes/readitlater.recipe
+++ b/recipes/readitlater.recipe
@@ -117,7 +117,7 @@ class Pocket(BasicNewsRecipe):
             self.user_error(
                 "Only {0} articles retrieved, minimum_articles not reached".format(len(pocket_feed)))
 
-        for pocket_article in pocket_feed.iteritems():
+        for pocket_article in pocket_feed.items():
             self.articles.append({
                 'item_id':      pocket_article[0],
                 'title':        pocket_article[1]['resolved_title'],
@@ -163,7 +163,7 @@ class Pocket(BasicNewsRecipe):
             for img in article['images']:
                 imgdiv = '<div id="RIL_IMG_{0}" class="RIL_IMG"></div>'.format(
                     article['images'][img]['image_id'])
-                imgtag = '<img src="{0}" \>'.format(
+                imgtag = r'<img src="{0}" \>'.format(
                     article['images'][img]['src'])
                 tmpbody = tmpbody.replace(imgdiv, imgtag)
 
diff --git a/recipes/smith.recipe b/recipes/smith.recipe
index dcd78de467..956d697490 100644
--- a/recipes/smith.recipe
+++ b/recipes/smith.recipe
@@ -39,7 +39,7 @@ class Smithsonian(BasicNewsRecipe):
 
         # Find date
         date = re.sub(
-            '.*\:\W*', "", self.tag_to_string(div.find('h1')).strip())
+            r'.*\:\W*', "", self.tag_to_string(div.find('h1')).strip())
         self.timefmt = u' [%s]' % date
 
         # Find cover
@@ -66,5 +66,5 @@ class Smithsonian(BasicNewsRecipe):
                 self.log('\t', url)
                 articles.append(
                     {'title': title, 'url': url, 'description': desc})
-        ans = [(key, val) for key, val in feeds.iteritems()]
+        ans = [(key, val) for key, val in feeds.items()]
         return ans
diff --git a/setup/hosting.py b/setup/hosting.py
index 92a19b6ff4..424d0e9c63 100644
--- a/setup/hosting.py
+++ b/setup/hosting.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python2
 # vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
-from __future__ import (unicode_literals, division, absolute_import,
-                        print_function)
+from __future__ import (unicode_literals, division, absolute_import, print_function)
 
-__license__   = 'GPL v3'
+__license__ = 'GPL v3'
 __copyright__ = '2011, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
@@ -13,6 +12,7 @@ from argparse import ArgumentParser, FileType
 from subprocess import check_call
 from collections import OrderedDict
 
+
 class ReadFileWithProgressReporting(file):  # {{{
 
     def __init__(self, path, mode='rb'):
@@ -34,26 +34,32 @@ class ReadFileWithProgressReporting(file):  # {{{
     def report_progress(self, size):
         sys.stdout.write(b'\x1b[s')
         sys.stdout.write(b'\x1b[K')
-        frac = float(self.tell())/self._total
-        mb_pos = self.tell()/float(1024**2)
-        mb_tot = self._total/float(1024**2)
-        kb_pos = self.tell()/1024.0
-        kb_rate = kb_pos/(time.time()-self.start_time)
+        frac = float(self.tell()) / self._total
+        mb_pos = self.tell() / float(1024**2)
+        mb_tot = self._total / float(1024**2)
+        kb_pos = self.tell() / 1024.0
+        kb_rate = kb_pos / (time.time() - self.start_time)
         bit_rate = kb_rate * 1024
-        eta = int((self._total - self.tell())/bit_rate) + 1
+        eta = int((self._total - self.tell()) / bit_rate) + 1
         eta_m, eta_s = eta / 60, eta % 60
         sys.stdout.write(
-            '  %.1f%%   %.1f/%.1fMB %.1f KB/sec    %d minutes, %d seconds left'%(
-                frac*100, mb_pos, mb_tot, kb_rate, eta_m, eta_s))
+            '  %.1f%%   %.1f/%.1fMB %.1f KB/sec    %d minutes, %d seconds left' %
+            (frac * 100, mb_pos, mb_tot, kb_rate, eta_m, eta_s)
+        )
         sys.stdout.write(b'\x1b[u')
         if self.tell() >= self._total:
             sys.stdout.write('\n')
             t = int(time.time() - self.start_time) + 1
-            print ('Upload took %d minutes and %d seconds at %.1f KB/sec' % (
-                t/60, t%60, kb_rate))
+            print(
+                'Upload took %d minutes and %d seconds at %.1f KB/sec' %
+                (t / 60, t % 60, kb_rate)
+            )
         sys.stdout.flush()
+
+
 # }}}
 
+
 class Base(object):  # {{{
 
     def __init__(self):
@@ -69,13 +75,15 @@ class Base(object):  # {{{
         sys.stdout.flush()
 
     def warn(self, *args, **kwargs):
-        print('\n'+'_'*20, 'WARNING','_'*20)
+        print('\n' + '_' * 20, 'WARNING', '_' * 20)
         print(*args, **kwargs)
-        print('_'*50)
+        print('_' * 50)
         sys.stdout.flush()
 
+
 # }}}
 
+
 class SourceForge(Base):  # {{{
 
     # Note that you should manually ssh once to username,project@frs.sourceforge.net
@@ -83,7 +91,7 @@ class SourceForge(Base):  # {{{
 
     def __init__(self, files, project, version, username, replace=False):
         self.username, self.project, self.version = username, project, version
-        self.base = '/home/frs/project/c/ca/'+project
+        self.base = '/home/frs/project/c/ca/' + project
         self.rdir = self.base + '/' + version
         self.files = files
 
@@ -93,27 +101,32 @@ class SourceForge(Base):  # {{{
             self.info('Uploading', x)
             for i in range(5):
                 try:
-                    check_call(['rsync', '-h', '-z', '--progress', '-e', 'ssh -x', x,
-                    '%s,%s@frs.sourceforge.net:%s'%(self.username, self.project,
-                        self.rdir+'/')])
+                    check_call([
+                        'rsync', '-h', '-z', '--progress', '-e', 'ssh -x', x,
+                        '%s,%s@frs.sourceforge.net:%s' %
+                        (self.username, self.project, self.rdir + '/')
+                    ])
                 except KeyboardInterrupt:
                     raise SystemExit(1)
                 except:
-                    print ('\nUpload failed, trying again in 30 seconds')
+                    print('\nUpload failed, trying again in 30 seconds')
                     time.sleep(30)
                 else:
                     break
-            print ('Uploaded in', int(time.time() - start), 'seconds\n\n')
+            print('Uploaded in', int(time.time() - start), 'seconds\n\n')
+
 
 # }}}
 
+
 class GitHub(Base):  # {{{
 
     API = 'https://api.github.com/'
 
     def __init__(self, files, reponame, version, username, password, replace=False):
         self.files, self.reponame, self.version, self.username, self.password, self.replace = (
-            files, reponame, version, username, password, replace)
+            files, reponame, version, username, password, replace
+        )
         self.current_tag_name = 'v' + self.version
         import requests
         self.requests = s = requests.Session()
@@ -126,12 +139,17 @@ class GitHub(Base):  # {{{
         release = self.create_release(releases)
         upload_url = release['upload_url'].partition('{')[0]
         existing_assets = self.existing_assets(release['id'])
-        for path, desc in self.files.iteritems():
+        for path, desc in self.files.items():
             self.info('')
-            url = self.API + 'repos/%s/%s/releases/assets/{}' % (self.username, self.reponame)
+            url = self.API + 'repos/%s/%s/releases/assets/{}' % (
+                self.username, self.reponame
+            )
             fname = os.path.basename(path)
             if fname in existing_assets:
-                self.info('Deleting %s from GitHub with id: %s' % (fname, existing_assets[fname]))
+                self.info(
+                    'Deleting %s from GitHub with id: %s' %
+                    (fname, existing_assets[fname])
+                )
                 r = self.requests.delete(url.format(existing_assets[fname]))
                 if r.status_code != 204:
                     self.fail(r, 'Failed to delete %s from GitHub' % fname)
@@ -139,36 +157,61 @@ class GitHub(Base):  # {{{
             if r.status_code != 201:
                 self.fail(r, 'Failed to upload file: %s' % fname)
             try:
-                r = self.requests.patch(url.format(r.json()['id']),
-                                data=json.dumps({'name':fname, 'label':desc}))
+                r = self.requests.patch(
+                    url.format(r.json()['id']),
+                    data=json.dumps({
+                        'name': fname,
+                        'label': desc
+                    })
+                )
             except Exception:
                 time.sleep(15)
-                r = self.requests.patch(url.format(r.json()['id']),
-                                data=json.dumps({'name':fname, 'label':desc}))
+                r = self.requests.patch(
+                    url.format(r.json()['id']),
+                    data=json.dumps({
+                        'name': fname,
+                        'label': desc
+                    })
+                )
             if r.status_code != 200:
                 self.fail(r, 'Failed to set label for %s' % fname)
 
     def clean_older_releases(self, releases):
         for release in releases:
-            if release.get('assets', None) and release['tag_name'] != self.current_tag_name:
-                self.info('\nDeleting old released installers from: %s' % release['tag_name'])
+            if release.get('assets',
+                           None) and release['tag_name'] != self.current_tag_name:
+                self.info(
+                    '\nDeleting old released installers from: %s' %
+                    release['tag_name']
+                )
                 for asset in release['assets']:
-                    r = self.requests.delete(self.API + 'repos/%s/%s/releases/assets/%s' % (self.username, self.reponame, asset['id']))
+                    r = self.requests.delete(
+                        self.API + 'repos/%s/%s/releases/assets/%s' %
+                        (self.username, self.reponame, asset['id'])
+                    )
                     if r.status_code != 204:
-                        self.fail(r, 'Failed to delete obsolete asset: %s for release: %s' % (
-                            asset['name'], release['tag_name']))
+                        self.fail(
+                            r, 'Failed to delete obsolete asset: %s for release: %s'
+                            % (asset['name'], release['tag_name'])
+                        )
 
     def do_upload(self, url, path, desc, fname):
         mime_type = mimetypes.guess_type(fname)[0]
         self.info('Uploading to GitHub: %s (%s)' % (fname, mime_type))
         with ReadFileWithProgressReporting(path) as f:
             return self.requests.post(
-                url, headers={'Content-Type': mime_type, 'Content-Length':str(f._total)}, params={'name':fname},
-                data=f)
+                url,
+                headers={
+                    'Content-Type': mime_type,
+                    'Content-Length': str(f._total)
+                },
+                params={'name': fname},
+                data=f
+            )
 
     def fail(self, r, msg):
-        print (msg, ' Status Code: %s' % r.status_code, file=sys.stderr)
-        print ("JSON from response:", file=sys.stderr)
+        print(msg, ' Status Code: %s' % r.status_code, file=sys.stderr)
+        print("JSON from response:", file=sys.stderr)
         pprint(dict(r.json()), stream=sys.stderr)
         raise SystemExit(1)
 
@@ -177,11 +220,13 @@ class GitHub(Base):  # {{{
         return error_code == 'already_exists'
 
     def existing_assets(self, release_id):
-        url = self.API + 'repos/%s/%s/releases/%s/assets' % (self.username, self.reponame, release_id)
+        url = self.API + 'repos/%s/%s/releases/%s/assets' % (
+            self.username, self.reponame, release_id
+        )
         r = self.requests.get(url)
         if r.status_code != 200:
             self.fail('Failed to get assets for release')
-        return {asset['name']:asset['id'] for asset in r.json()}
+        return {asset['name']: asset['id'] for asset in r.json()}
 
     def releases(self):
         url = self.API + 'repos/%s/%s/releases' % (self.username, self.reponame)
@@ -197,19 +242,25 @@ class GitHub(Base):  # {{{
             if release['tag_name'] == self.current_tag_name:
                 return release
         url = self.API + 'repos/%s/%s/releases' % (self.username, self.reponame)
-        r = self.requests.post(url, data=json.dumps({
-            'tag_name': self.current_tag_name,
-            'target_commitish': 'master',
-            'name': 'version %s' % self.version,
-            'body': 'Release version %s' % self.version,
-            'draft': False, 'prerelease':False
-        }))
+        r = self.requests.post(
+            url,
+            data=json.dumps({
+                'tag_name': self.current_tag_name,
+                'target_commitish': 'master',
+                'name': 'version %s' % self.version,
+                'body': 'Release version %s' % self.version,
+                'draft': False,
+                'prerelease': False
+            })
+        )
         if r.status_code != 201:
             self.fail(r, 'Failed to create release for version: %s' % self.version)
         return r.json()
 
+
 # }}}
 
+
 def generate_index():  # {{{
     os.chdir('/srv/download')
     releases = set()
@@ -238,21 +289,36 @@ def generate_index():  # {{{
     '''
     body = []
     for series in rmap:
-        body.append('<li><a href="{0}.html" title="Releases in the {0}.x series">{0}.x</a>\xa0\xa0\xa0<span style="font-size:smaller">[{1} releases]</span></li>'.format(  # noqa
-                '.'.join(map(type(''), series)), len(rmap[series])))
+        body.append(
+            '<li><a href="{0}.html" title="Releases in the {0}.x series">{0}.x</a>\xa0\xa0\xa0<span style="font-size:smaller">[{1} releases]</span></li>'
+            .format(  # noqa
+                '.'.join(map(type(''), series)), len(rmap[series])
+            )
+        )
     body = '<ul>{0}</ul>'.format(' '.join(body))
-    index = template.format(title='Previous calibre releases', style=style, msg='Choose a series of calibre releases', body=body)
+    index = template.format(
+        title='Previous calibre releases',
+        style=style,
+        msg='Choose a series of calibre releases',
+        body=body
+    )
     with open('index.html', 'wb') as f:
         f.write(index.encode('utf-8'))
 
-    for series, releases in rmap.iteritems():
+    for series, releases in rmap.items():
         sname = '.'.join(map(type(''), series))
         body = [
-            '<li><a href="{0}/" title="Release {0}">{0}</a></li>'.format('.'.join(map(type(''), r)))
-            for r in releases]
+            '<li><a href="{0}/" title="Release {0}">{0}</a></li>'.format(
+                '.'.join(map(type(''), r))
+            ) for r in releases
+        ]
         body = '<ul class="release-list">{0}</ul>'.format(' '.join(body))
-        index = template.format(title='Previous calibre releases (%s.x)' % sname, style=style,
-                                msg='Choose a calibre release', body=body)
+        index = template.format(
+            title='Previous calibre releases (%s.x)' % sname,
+            style=style,
+            msg='Choose a calibre release',
+            body=body
+        )
         with open('%s.html' % sname, 'wb') as f:
             f.write(index.encode('utf-8'))
 
@@ -264,41 +330,69 @@ def generate_index():  # {{{
                 files = os.listdir('.')
                 windows = [x for x in files if x.endswith('.msi')]
                 if windows:
-                    windows = ['<li><a href="{0}" title="{1}">{1}</a></li>'.format(
-                        x, 'Windows 64-bit Installer' if '64bit' in x else 'Windows 32-bit Installer')
-                        for x in windows]
-                    body.append('<dt>Windows</dt><dd><ul>{0}</ul></dd>'.format(' '.join(windows)))
+                    windows = [
+                        '<li><a href="{0}" title="{1}">{1}</a></li>'.format(
+                            x, 'Windows 64-bit Installer'
+                            if '64bit' in x else 'Windows 32-bit Installer'
+                        ) for x in windows
+                    ]
+                    body.append(
+                        '<dt>Windows</dt><dd><ul>{0}</ul></dd>'.format(
+                            ' '.join(windows)
+                        )
+                    )
                 portable = [x for x in files if '-portable-' in x]
                 if portable:
-                    body.append('<dt>Calibre Portable</dt><dd><a href="{0}" title="{1}">{1}</a></dd>'.format(
-                        portable[0], 'Calibre Portable Installer'))
+                    body.append(
+                        '<dt>Calibre Portable</dt><dd><a href="{0}" title="{1}">{1}</a></dd>'
+                        .format(portable[0], 'Calibre Portable Installer')
+                    )
                 osx = [x for x in files if x.endswith('.dmg')]
                 if osx:
-                    body.append('<dt>Apple Mac</dt><dd><a href="{0}" title="{1}">{1}</a></dd>'.format(
-                        osx[0], 'OS X Disk Image (.dmg)'))
-                linux = [x for x in files if x.endswith('.txz') or x.endswith('tar.bz2')]
+                    body.append(
+                        '<dt>Apple Mac</dt><dd><a href="{0}" title="{1}">{1}</a></dd>'
+                        .format(osx[0], 'OS X Disk Image (.dmg)')
+                    )
+                linux = [
+                    x for x in files if x.endswith('.txz') or x.endswith('tar.bz2')
+                ]
                 if linux:
-                    linux = ['<li><a href="{0}" title="{1}">{1}</a></li>'.format(
-                        x, 'Linux 64-bit binary' if 'x86_64' in x else 'Linux 32-bit binary')
-                        for x in linux]
-                    body.append('<dt>Linux</dt><dd><ul>{0}</ul></dd>'.format(' '.join(linux)))
+                    linux = [
+                        '<li><a href="{0}" title="{1}">{1}</a></li>'.format(
+                            x, 'Linux 64-bit binary'
+                            if 'x86_64' in x else 'Linux 32-bit binary'
+                        ) for x in linux
+                    ]
+                    body.append(
+                        '<dt>Linux</dt><dd><ul>{0}</ul></dd>'.format(
+                            ' '.join(linux)
+                        )
+                    )
                 source = [x for x in files if x.endswith('.xz') or x.endswith('.gz')]
                 if source:
-                    body.append('<dt>Source Code</dt><dd><a href="{0}" title="{1}">{1}</a></dd>'.format(
-                        source[0], 'Source code (all platforms)'))
+                    body.append(
+                        '<dt>Source Code</dt><dd><a href="{0}" title="{1}">{1}</a></dd>'
+                        .format(source[0], 'Source code (all platforms)')
+                    )
 
                 body = '<dl>{0}</dl>'.format(''.join(body))
-                index = template.format(title='calibre release (%s)' % rname, style=style,
-                                msg='', body=body)
+                index = template.format(
+                    title='calibre release (%s)' % rname,
+                    style=style,
+                    msg='',
+                    body=body
+                )
                 with open('index.html', 'wb') as f:
                     f.write(index.encode('utf-8'))
             finally:
                 os.chdir('..')
 
+
 # }}}
 
 SERVER_BASE = '/srv/download/'
 
+
 def upload_to_servers(files, version):  # {{{
     base = SERVER_BASE
     dest = os.path.join(base, version)
@@ -312,7 +406,7 @@ def upload_to_servers(files, version):  # {{{
     finally:
         os.chdir(cwd)
 
-    # for server, rdir in {'files':'/srv/download/'}.iteritems():
+    # for server, rdir in {'files':'/srv/download/'}.items():
     #     print('Uploading to server:', server)
     #     server = '%s.calibre-ebook.com' % server
     #     # Copy the generated index files
@@ -337,56 +431,72 @@ def upload_to_servers(files, version):  # {{{
     #                 break
     #         print ('Uploaded in', int(time.time() - start), 'seconds\n\n')
     #
+
+
 # }}}
 
+
 # CLI {{{
 def cli_parser():
-    epilog='Copyright Kovid Goyal 2012'
+    epilog = 'Copyright Kovid Goyal 2012'
 
     p = ArgumentParser(
-            description='Upload project files to a hosting service automatically',
-            epilog=epilog
-            )
+        description='Upload project files to a hosting service automatically',
+        epilog=epilog
+    )
     a = p.add_argument
-    a('appname', help='The name of the application, all files to'
-            ' upload should begin with this name')
-    a('version', help='The version of the application, all files to'
-            ' upload should contain this version')
-    a('file_map', type=FileType('rb'),
-            help='A file containing a mapping of files to be uploaded to '
-            'descriptions of the files. The descriptions will be visible '
-            'to users trying to get the file from the hosting service. '
-            'The format of the file is filename: description, with one per '
-            'line. filename can be a path to the file relative to the current '
-            'directory.')
-    a('--replace', action='store_true', default=False,
-            help='If specified, existing files are replaced, otherwise '
-            'they are skipped.')
+    a(
+        'appname',
+        help='The name of the application, all files to'
+        ' upload should begin with this name'
+    )
+    a(
+        'version',
+        help='The version of the application, all files to'
+        ' upload should contain this version'
+    )
+    a(
+        'file_map',
+        type=FileType('rb'),
+        help='A file containing a mapping of files to be uploaded to '
+        'descriptions of the files. The descriptions will be visible '
+        'to users trying to get the file from the hosting service. '
+        'The format of the file is filename: description, with one per '
+        'line. filename can be a path to the file relative to the current '
+        'directory.'
+    )
+    a(
+        '--replace',
+        action='store_true',
+        default=False,
+        help='If specified, existing files are replaced, otherwise '
+        'they are skipped.'
+    )
 
-    subparsers = p.add_subparsers(help='Where to upload to', dest='service',
-            title='Service', description='Hosting service to upload to')
-    sf = subparsers.add_parser('sourceforge', help='Upload to sourceforge',
-            epilog=epilog)
-    gh = subparsers.add_parser('github', help='Upload to GitHub',
-            epilog=epilog)
+    subparsers = p.add_subparsers(
+        help='Where to upload to',
+        dest='service',
+        title='Service',
+        description='Hosting service to upload to'
+    )
+    sf = subparsers.add_parser(
+        'sourceforge', help='Upload to sourceforge', epilog=epilog
+    )
+    gh = subparsers.add_parser('github', help='Upload to GitHub', epilog=epilog)
     subparsers.add_parser('calibre', help='Upload to calibre file servers')
 
     a = sf.add_argument
-    a('project',
-            help='The name of the project on sourceforge we are uploading to')
-    a('username',
-            help='Sourceforge username')
+    a('project', help='The name of the project on sourceforge we are uploading to')
+    a('username', help='Sourceforge username')
 
     a = gh.add_argument
-    a('project',
-            help='The name of the repository on GitHub we are uploading to')
-    a('username',
-            help='Username to log into your GitHub account')
-    a('password',
-            help='Password to log into your GitHub account')
+    a('project', help='The name of the repository on GitHub we are uploading to')
+    a('username', help='Username to log into your GitHub account')
+    a('password', help='Password to log into your GitHub account')
 
     return p
 
+
 def main(args=None):
     cli = cli_parser()
     args = cli.parse_args(args)
@@ -399,20 +509,28 @@ def main(args=None):
                 files[fname] = desc
 
     ofiles = OrderedDict()
-    for x in sorted(files, key=lambda x:os.stat(x).st_size, reverse=True):
+    for x in sorted(files, key=lambda x: os.stat(x).st_size, reverse=True):
         ofiles[x] = files[x]
 
     if args.service == 'sourceforge':
-        sf = SourceForge(ofiles, args.project, args.version, args.username,
-                replace=args.replace)
+        sf = SourceForge(
+            ofiles, args.project, args.version, args.username, replace=args.replace
+        )
         sf()
     elif args.service == 'github':
-        gh = GitHub(ofiles, args.project, args.version, args.username, args.password,
-                replace=args.replace)
+        gh = GitHub(
+            ofiles,
+            args.project,
+            args.version,
+            args.username,
+            args.password,
+            replace=args.replace
+        )
         gh()
     elif args.service == 'calibre':
         upload_to_servers(ofiles, args.version)
 
+
 if __name__ == '__main__':
     main()
 # }}}
diff --git a/src/calibre/devices/smart_device_app/driver.py b/src/calibre/devices/smart_device_app/driver.py
index 560e25985a..366a5dd467 100644
--- a/src/calibre/devices/smart_device_app/driver.py
+++ b/src/calibre/devices/smart_device_app/driver.py
@@ -37,7 +37,7 @@ from calibre.utils.filenames import ascii_filename as sanitize, shorten_componen
 from calibre.utils.mdns import (publish as publish_zeroconf, unpublish as
         unpublish_zeroconf, get_all_ips)
 from calibre.utils.socket_inheritance import set_socket_inherit
-from polyglot.builtins import unicode_type
+from polyglot.builtins import unicode_type, iteritems
 from polyglot import queue
 
 
@@ -266,7 +266,7 @@ class SMART_DEVICE_APP(DeviceConfig, DevicePlugin):
         'SET_CALIBRE_DEVICE_NAME': 2,
         'TOTAL_SPACE'            : 4,
     }
-    reverse_opcodes = dict([(v, k) for k,v in opcodes.iteritems()])
+    reverse_opcodes = {v: k for k, v in iteritems(opcodes)}
 
     MESSAGE_PASSWORD_ERROR = 1
     MESSAGE_UPDATE_NEEDED  = 2
@@ -397,7 +397,7 @@ class SMART_DEVICE_APP(DeviceConfig, DevicePlugin):
                 try:
                     if isinstance(a, dict):
                         printable = {}
-                        for k,v in a.iteritems():
+                        for k,v in iteritems(a):
                             if isinstance(v, (bytes, unicode_type)) and len(v) > 50:
                                 printable[k] = 'too long'
                             else:
@@ -540,7 +540,7 @@ class SMART_DEVICE_APP(DeviceConfig, DevicePlugin):
     # codec to first convert it to a string dict
     def _json_encode(self, op, arg):
         res = {}
-        for k,v in arg.iteritems():
+        for k,v in iteritems(arg):
             if isinstance(v, (Book, Metadata)):
                 res[k] = self.json_codec.encode_book_metadata(v)
                 series = v.get('series', None)
@@ -835,7 +835,7 @@ class SMART_DEVICE_APP(DeviceConfig, DevicePlugin):
             prefix = os.path.join(cache_dir(),
                         'wireless_device_' + self.device_uuid + '_metadata_cache')
             with lopen(prefix + '.tmp', mode='wb') as fd:
-                for key,book in self.device_book_cache.iteritems():
+                for key,book in iteritems(self.device_book_cache):
                     if (now_ - book['last_used']).days > self.PURGE_CACHE_ENTRIES_DAYS:
                         purged += 1
                         continue
@@ -1392,7 +1392,7 @@ class SMART_DEVICE_APP(DeviceConfig, DevicePlugin):
         coldict = {}
         if colattrs:
             collections = booklists[0].get_collections(colattrs)
-            for k,v in collections.iteritems():
+            for k,v in iteritems(collections):
                 lpaths = []
                 for book in v:
                     lpaths.append(book.lpath)
diff --git a/src/calibre/ebooks/metadata/book/base.py b/src/calibre/ebooks/metadata/book/base.py
index 97e84827c6..0f5c3fd176 100644
--- a/src/calibre/ebooks/metadata/book/base.py
+++ b/src/calibre/ebooks/metadata/book/base.py
@@ -422,7 +422,7 @@ class Metadata(object):
             m = dict(metadata)
             # Copying the elements should not be necessary. The objects referenced
             # in the dict should not change. Of course, they can be replaced.
-            # for k,v in metadata.iteritems():
+            # for k,v in iteritems(metadata):
             #     m[k] = copy.copy(v)
             if '#value#' not in m:
                 if m['datatype'] == 'text' and m['is_multiple']:
diff --git a/src/calibre/ebooks/metadata/sources/amazon.py b/src/calibre/ebooks/metadata/sources/amazon.py
index da64255ee5..4b238d1f50 100644
--- a/src/calibre/ebooks/metadata/sources/amazon.py
+++ b/src/calibre/ebooks/metadata/sources/amazon.py
@@ -293,7 +293,7 @@ class Worker(Thread):  # Get details {{{
             'chs': ('Chinese', u'中文', u'简体中文'),
         }
         self.lang_map = {}
-        for code, names in lm.iteritems():
+        for code, names in lm.items():
             for name in names:
                 self.lang_map[name] = code
 
@@ -313,7 +313,7 @@ class Worker(Thread):  # Get details {{{
         if not self.months:
             return raw
         ans = raw.lower()
-        for i, vals in self.months.iteritems():
+        for i, vals in self.months.items():
             for x in vals:
                 ans = ans.replace(x, self.english_months[i])
         ans = ans.replace(' de ', ' ')
@@ -746,7 +746,7 @@ class Worker(Thread):  # Get details {{{
                     mwidth = 0
                     try:
                         url = None
-                        for iurl, (width, height) in idata.iteritems():
+                        for iurl, (width, height) in idata.items():
                             if width > mwidth:
                                 mwidth = width
                                 url = iurl
@@ -949,7 +949,7 @@ class Amazon(Source):
         self.touched_fields = frozenset(tf)
 
     def get_domain_and_asin(self, identifiers, extra_domains=()):
-        for key, val in identifiers.iteritems():
+        for key, val in identifiers.items():
             key = key.lower()
             if key in ('amazon', 'asin'):
                 return 'com', val
@@ -1118,7 +1118,7 @@ class Amazon(Source):
             encode_to = 'latin1'
         encoded_q = dict([(x.encode(encode_to, 'ignore'), y.encode(encode_to,
                                                                    'ignore')) for x, y in
-                          q.iteritems()])
+                          q.items()])
         url = 'https://www.amazon.%s/s/?' % self.get_website_domain(
             domain) + urlencode(encoded_q)
         return url, domain
diff --git a/src/calibre/ebooks/metadata/sources/search_engines.py b/src/calibre/ebooks/metadata/sources/search_engines.py
index 1bf6fea908..fb48cca3c5 100644
--- a/src/calibre/ebooks/metadata/sources/search_engines.py
+++ b/src/calibre/ebooks/metadata/sources/search_engines.py
@@ -41,7 +41,7 @@ def browser():
 
 
 def encode_query(**query):
-    q = {k.encode('utf-8'): v.encode('utf-8') for k, v in query.iteritems()}
+    q = {k.encode('utf-8'): v.encode('utf-8') for k, v in query.items()}
     return urlencode(q).decode('utf-8')
 
 
diff --git a/src/calibre/ebooks/mobi/debug/mobi6.py b/src/calibre/ebooks/mobi/debug/mobi6.py
index 9cd0307045..30d206efa1 100644
--- a/src/calibre/ebooks/mobi/debug/mobi6.py
+++ b/src/calibre/ebooks/mobi/debug/mobi6.py
@@ -20,7 +20,7 @@ from calibre.ebooks.mobi.utils import (decode_hex_number, decint,
 from calibre.utils.imghdr import what
 from calibre.ebooks.mobi.debug import format_bytes
 from calibre.ebooks.mobi.debug.headers import TextRecord
-from polyglot.builtins import unicode_type, range
+from polyglot.builtins import unicode_type, range, iteritems
 
 
 class TagX(object):  # {{{
@@ -306,7 +306,7 @@ class IndexEntry(object):  # {{{
         except ValueError:
             self.index = ident
         self.tags = [Tag(tag_type, vals, cncx) for tag_type, vals in
-                entry.iteritems()]
+                iteritems(entry)]
 
     @property
     def label(self):
@@ -402,7 +402,7 @@ class IndexRecord(object):  # {{{
 
         self.indices = []
 
-        for ident, entry in table.iteritems():
+        for ident, entry in iteritems(table):
             self.indices.append(IndexEntry(ident, entry, cncx))
 
     def get_parent(self, index):
@@ -473,7 +473,7 @@ class CNCX(object):  # {{{
 
     def __str__(self):
         ans = ['*'*20 + ' cncx (%d strings) '%len(self.records)+ '*'*20]
-        for k, v in self.records.iteritems():
+        for k, v in iteritems(self.records):
             ans.append('%10d : %s'%(k, v))
         return '\n'.join(ans)
 
@@ -571,18 +571,18 @@ class TBSIndexing(object):  # {{{
 
     def __str__(self):
         ans = ['*'*20 + ' TBS Indexing (%d records) '%len(self.record_indices)+ '*'*20]
-        for r, dat in self.record_indices.iteritems():
+        for r, dat in iteritems(self.record_indices):
             ans += self.dump_record(r, dat)[-1]
         return '\n'.join(ans)
 
     def dump(self, bdir):
         types = defaultdict(list)
-        for r, dat in self.record_indices.iteritems():
+        for r, dat in iteritems(self.record_indices):
             tbs_type, strings = self.dump_record(r, dat)
             if tbs_type == 0:
                 continue
             types[tbs_type] += strings
-        for typ, strings in types.iteritems():
+        for typ, strings in iteritems(types):
             with open(os.path.join(bdir, 'tbs_type_%d.txt'%typ), 'wb') as f:
                 f.write('\n'.join(strings))
 
@@ -609,7 +609,7 @@ class TBSIndexing(object):  # {{{
             return bytes('0'*(4-len(ans)) + ans)
 
         def repr_extra(x):
-            return str({bin4(k):v for k, v in extra.iteritems()})
+            return str({bin4(k):v for k, v in iteritems(extra)})
 
         tbs_type = 0
         is_periodical = self.doc_type in (257, 258, 259)
diff --git a/src/calibre/ebooks/mobi/debug/mobi8.py b/src/calibre/ebooks/mobi/debug/mobi8.py
index 0b17d5817e..f8eef4fade 100644
--- a/src/calibre/ebooks/mobi/debug/mobi8.py
+++ b/src/calibre/ebooks/mobi/debug/mobi8.py
@@ -19,7 +19,7 @@ from calibre.ebooks.mobi.utils import read_font_record, decode_tbs, RECORD_SIZE
 from calibre.ebooks.mobi.debug import format_bytes
 from calibre.ebooks.mobi.reader.headers import NULL_INDEX
 from calibre.utils.imghdr import what
-from polyglot.builtins import zip
+from polyglot.builtins import zip, iteritems
 
 
 class FDST(object):
@@ -274,7 +274,7 @@ class MOBIFile(object):
                     break
                 flag_sz = 4
                 tbs_bytes = tbs_bytes[consumed:]
-                extra = {bin(k):v for k, v in extra.iteritems()}
+                extra = {bin(k):v for k, v in iteritems(extra)}
                 sequences.append((val, extra))
             for j, seq in enumerate(sequences):
                 desc.append('Sequence #%d: %r %r'%(j, seq[0], seq[1]))
diff --git a/src/calibre/ebooks/pdf/render/serialize.py b/src/calibre/ebooks/pdf/render/serialize.py
index ed910bc618..c5cee3b20f 100644
--- a/src/calibre/ebooks/pdf/render/serialize.py
+++ b/src/calibre/ebooks/pdf/render/serialize.py
@@ -8,7 +8,7 @@ __copyright__ = '2012, Kovid Goyal <kovid at kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
 import hashlib, numbers
-from polyglot.builtins import map
+from polyglot.builtins import map, iteritems
 
 from PyQt5.Qt import QBuffer, QByteArray, QImage, Qt, QColor, qRgba, QPainter
 
@@ -119,24 +119,24 @@ class Page(Stream):
         r = Dictionary()
         if self.opacities:
             extgs = Dictionary()
-            for opref, name in self.opacities.iteritems():
+            for opref, name in iteritems(self.opacities):
                 extgs[name] = opref
             r['ExtGState'] = extgs
         if self.fonts:
             fonts = Dictionary()
-            for ref, name in self.fonts.iteritems():
+            for ref, name in iteritems(self.fonts):
                 fonts[name] = ref
             r['Font'] = fonts
         if self.xobjects:
             xobjects = Dictionary()
-            for ref, name in self.xobjects.iteritems():
+            for ref, name in iteritems(self.xobjects):
                 xobjects[name] = ref
             r['XObject'] = xobjects
         if self.patterns:
             r['ColorSpace'] = Dictionary({'PCSp':Array(
                 [Name('Pattern'), Name('DeviceRGB')])})
             patterns = Dictionary()
-            for ref, name in self.patterns.iteritems():
+            for ref, name in iteritems(self.patterns):
                 patterns[name] = ref
             r['Pattern'] = patterns
         if r:
diff --git a/src/calibre/gui2/dbus_export/gtk.py b/src/calibre/gui2/dbus_export/gtk.py
index f92b1d2a9d..8206536339 100644
--- a/src/calibre/gui2/dbus_export/gtk.py
+++ b/src/calibre/gui2/dbus_export/gtk.py
@@ -15,7 +15,7 @@ from pprint import pformat
 
 from gi.repository import Gtk, Gdk, GdkX11  # noqa
 
-from polyglot.builtins import unicode_type
+from polyglot.builtins import unicode_type, iteritems
 
 UI_INFO = """
 <ui>
@@ -208,7 +208,7 @@ def convert(v):
     if isinstance(v, list):
         return [convert(val) for val in v]
     if isinstance(v, dict):
-        return {convert(k):convert(val) for k, val in v.iteritems()}
+        return {convert(k):convert(val) for k, val in iteritems(v)}
     if isinstance(v, dbus.Boolean):
         return bool(v)
     if isinstance(v, (dbus.UInt32, dbus.UInt16)):
@@ -233,10 +233,10 @@ class MyApplication(Gtk.Application):
         conn = xcb.Connection()
         atoms = conn.core.ListProperties(win_id).reply().atoms
         atom_names = {atom:conn.core.GetAtomNameUnchecked(atom) for atom in atoms}
-        atom_names = {k:bytes(a.reply().name.buf()) for k, a in atom_names.iteritems()}
-        property_names = {name:atom for atom, name in atom_names.iteritems() if
+        atom_names = {k:bytes(a.reply().name.buf()) for k, a in iteritems(atom_names)}
+        property_names = {name:atom for atom, name in iteritems(atom_names) if
             name.startswith('_GTK') or name.startswith('_UNITY') or name.startswith('_GNOME')}
-        replies = {name:conn.core.GetProperty(False, win_id, atom, xcb.xproto.GetPropertyType.Any, 0, 2 ** 32 - 1) for name, atom in property_names.iteritems()}
+        replies = {name:conn.core.GetProperty(False, win_id, atom, xcb.xproto.GetPropertyType.Any, 0, 2 ** 32 - 1) for name, atom in iteritems(property_names)}
 
         type_atom_cache = {}
 
@@ -256,7 +256,7 @@ class MyApplication(Gtk.Application):
                                         property_reply.value.buf()))
 
             return None
-        props = {name:get_property_value(r.reply()) for name, r in replies.iteritems()}
+        props = {name:get_property_value(r.reply()) for name, r in iteritems(replies)}
         ans = ['\nX Window properties:']
         for name in sorted(props):
             ans.append('%s: %r' % (name, props[name]))
@@ -277,7 +277,7 @@ class MyApplication(Gtk.Application):
             print ('Subscription group:', item[0])
             print ('Menu number:', item[1])
             for menu_item in item[2]:
-                menu_item = {unicode_type(k):convert(v) for k, v in menu_item.iteritems()}
+                menu_item = {unicode_type(k):convert(v) for k, v in iteritems(menu_item)}
                 if ':submenu' in menu_item:
                     groups.add(menu_item[':submenu'][0])
                 if ':section' in menu_item:
diff --git a/src/calibre/gui2/dbus_export/utils.py b/src/calibre/gui2/dbus_export/utils.py
index 0c5bd16d65..fa93c13d5a 100644
--- a/src/calibre/gui2/dbus_export/utils.py
+++ b/src/calibre/gui2/dbus_export/utils.py
@@ -12,7 +12,7 @@ import dbus
 
 from PyQt5.Qt import QSize, QImage, Qt, QKeySequence, QBuffer, QByteArray
 
-from polyglot.builtins import unicode_type
+from polyglot.builtins import unicode_type, iteritems
 
 
 def log(*args, **kw):
@@ -110,7 +110,7 @@ def key_sequence_to_dbus_shortcut(qks):
         if key == -1 or key == Qt.Key_unknown:
             continue
         items = []
-        for mod, name in {Qt.META:'Super', Qt.CTRL:'Control', Qt.ALT:'Alt', Qt.SHIFT:'Shift'}.iteritems():
+        for mod, name in iteritems({Qt.META:'Super', Qt.CTRL:'Control', Qt.ALT:'Alt', Qt.SHIFT:'Shift'}):
             if key & mod == mod:
                 items.append(name)
         key &= int(~(Qt.ShiftModifier | Qt.ControlModifier | Qt.AltModifier | Qt.MetaModifier | Qt.KeypadModifier))
@@ -146,7 +146,7 @@ def set_X_window_properties(win_id, **properties):
     conn = xcb.connect()
     atoms = {name:conn.core.InternAtom(False, len(name), name) for name in properties}
     utf8_string_atom = None
-    for name, val in properties.iteritems():
+    for name, val in iteritems(properties):
         atom = atoms[name].reply().atom
         type_atom = xcb.xproto.Atom.STRING
         if isinstance(val, unicode_type):
diff --git a/src/calibre/gui2/store/loader.py b/src/calibre/gui2/store/loader.py
index 02be4abdda..3f6ac0b2f6 100644
--- a/src/calibre/gui2/store/loader.py
+++ b/src/calibre/gui2/store/loader.py
@@ -17,6 +17,7 @@ from calibre.constants import numeric_version, DEBUG
 from calibre.gui2.store import StorePlugin
 from calibre.utils.config import JSONConfig
 from polyglot.urllib import urlencode
+from polyglot.builtins import iteritems
 
 
 class VersionMismatch(ValueError):
@@ -28,7 +29,7 @@ class VersionMismatch(ValueError):
 
 def download_updates(ver_map={}, server='https://code.calibre-ebook.com'):
     from calibre.utils.https import get_https_resource_securely
-    data = {k:type(u'')(v) for k, v in ver_map.iteritems()}
+    data = {k:type(u'')(v) for k, v in iteritems(ver_map)}
     data['ver'] = '1'
     url = '%s/stores?%s'%(server, urlencode(data))
     # We use a timeout here to ensure the non-daemonic update thread does not
@@ -58,7 +59,7 @@ class Stores(OrderedDict):
         self.version_map = {}
         self.cached_version_map = {}
         self.name_rmap = {}
-        for key, val in self.iteritems():
+        for key, val in iteritems(self):
             prefix, name = val.__module__.rpartition('.')[0::2]
             if prefix == 'calibre.gui2.store.stores' and name.endswith('_plugin'):
                 module = sys.modules[val.__module__]
@@ -74,7 +75,7 @@ class Stores(OrderedDict):
         # Load plugins from on disk cache
         remove = set()
         pat = re.compile(r'^store_version\s*=\s*(\d+)', re.M)
-        for name, src in self.cache_file.iteritems():
+        for name, src in iteritems(self.cache_file):
             try:
                 key = self.name_rmap[name]
             except KeyError:
@@ -123,7 +124,7 @@ class Stores(OrderedDict):
 
     def download_updates(self):
         ver_map = {name:max(ver, self.cached_version_map.get(name, -1))
-            for name, ver in self.version_map.iteritems()}
+            for name, ver in iteritems(self.version_map)}
         try:
             updates = download_updates(ver_map)
         except:
@@ -159,7 +160,7 @@ class Stores(OrderedDict):
 
         if replacements:
             with self.cache_file:
-                for name, src in replacements.iteritems():
+                for name, src in iteritems(replacements):
                     self.cache_file[name] = src
 
     def replace_plugin(self, ver, name, obj, source):
diff --git a/src/calibre/gui2/store/stores/amazon_au_plugin.py b/src/calibre/gui2/store/stores/amazon_au_plugin.py
index ef37e0a71e..54e980ac2b 100644
--- a/src/calibre/gui2/store/stores/amazon_au_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_au_plugin.py
@@ -43,7 +43,7 @@ def search_amazon(query, max_results=10, timeout=60,
         if isinstance(x, type('')):
             x = x.encode('utf-8')
         return x
-    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.items()}
     url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser(user_agent=get_user_agent())
 
diff --git a/src/calibre/gui2/store/stores/amazon_ca_plugin.py b/src/calibre/gui2/store/stores/amazon_ca_plugin.py
index baa31f91a3..f05b0f986c 100644
--- a/src/calibre/gui2/store/stores/amazon_ca_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_ca_plugin.py
@@ -43,7 +43,7 @@ def search_amazon(query, max_results=10, timeout=60,
         if isinstance(x, type('')):
             x = x.encode('utf-8')
         return x
-    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.items()}
     url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser(user_agent=get_user_agent())
 
diff --git a/src/calibre/gui2/store/stores/amazon_de_plugin.py b/src/calibre/gui2/store/stores/amazon_de_plugin.py
index 06a6df7859..6d6fca72d6 100644
--- a/src/calibre/gui2/store/stores/amazon_de_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_de_plugin.py
@@ -45,7 +45,7 @@ def search_amazon(query, max_results=10, timeout=60,
         if isinstance(x, type('')):
             x = x.encode('utf-8')
         return x
-    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.items()}
     url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser(user_agent=get_user_agent())
 
diff --git a/src/calibre/gui2/store/stores/amazon_es_plugin.py b/src/calibre/gui2/store/stores/amazon_es_plugin.py
index 859473a660..207625010c 100644
--- a/src/calibre/gui2/store/stores/amazon_es_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_es_plugin.py
@@ -45,7 +45,7 @@ def search_amazon(query, max_results=10, timeout=60,
         if isinstance(x, type('')):
             x = x.encode('utf-8')
         return x
-    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.items()}
     url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser(user_agent=get_user_agent())
 
diff --git a/src/calibre/gui2/store/stores/amazon_fr_plugin.py b/src/calibre/gui2/store/stores/amazon_fr_plugin.py
index 59479b70f6..f4b3209619 100644
--- a/src/calibre/gui2/store/stores/amazon_fr_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_fr_plugin.py
@@ -45,7 +45,7 @@ def search_amazon(query, max_results=10, timeout=60,
         if isinstance(x, type('')):
             x = x.encode('utf-8')
         return x
-    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.items()}
     url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser(user_agent=get_user_agent())
 
diff --git a/src/calibre/gui2/store/stores/amazon_in_plugin.py b/src/calibre/gui2/store/stores/amazon_in_plugin.py
index 1b88c529b1..1c4494e24e 100644
--- a/src/calibre/gui2/store/stores/amazon_in_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_in_plugin.py
@@ -43,7 +43,7 @@ def search_amazon(query, max_results=10, timeout=60,
         if isinstance(x, type('')):
             x = x.encode('utf-8')
         return x
-    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.items()}
     url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser(user_agent=get_user_agent())
 
diff --git a/src/calibre/gui2/store/stores/amazon_it_plugin.py b/src/calibre/gui2/store/stores/amazon_it_plugin.py
index a9c79448fa..7dc3887bd1 100644
--- a/src/calibre/gui2/store/stores/amazon_it_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_it_plugin.py
@@ -45,7 +45,7 @@ def search_amazon(query, max_results=10, timeout=60,
         if isinstance(x, type('')):
             x = x.encode('utf-8')
         return x
-    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.items()}
     url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser(user_agent=get_user_agent())
 
diff --git a/src/calibre/gui2/store/stores/amazon_plugin.py b/src/calibre/gui2/store/stores/amazon_plugin.py
index 06cef29478..e9543e3605 100644
--- a/src/calibre/gui2/store/stores/amazon_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_plugin.py
@@ -43,7 +43,7 @@ def search_amazon(query, max_results=10, timeout=60,
         if isinstance(x, type('')):
             x = x.encode('utf-8')
         return x
-    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.items()}
     url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser(user_agent=get_user_agent())
 
diff --git a/src/calibre/gui2/store/stores/amazon_uk_plugin.py b/src/calibre/gui2/store/stores/amazon_uk_plugin.py
index 12fb9064a4..3dae69f495 100644
--- a/src/calibre/gui2/store/stores/amazon_uk_plugin.py
+++ b/src/calibre/gui2/store/stores/amazon_uk_plugin.py
@@ -43,7 +43,7 @@ def search_amazon(query, max_results=10, timeout=60,
         if isinstance(x, type('')):
             x = x.encode('utf-8')
         return x
-    uquery = {asbytes(k):asbytes(v) for k, v in uquery.iteritems()}
+    uquery = {asbytes(k):asbytes(v) for k, v in uquery.items()}
     url = base_url + '?' + urllib.urlencode(uquery).decode('ascii')
     br = browser(user_agent=get_user_agent())
 
diff --git a/src/calibre/gui2/tweak_book/toc.py b/src/calibre/gui2/tweak_book/toc.py
index fd84b91fc0..84e6297e46 100644
--- a/src/calibre/gui2/tweak_book/toc.py
+++ b/src/calibre/gui2/tweak_book/toc.py
@@ -181,13 +181,13 @@ class TOCViewer(QWidget):
         menu.addAction(self.refresh_action)
         menu.exec_(self.view.mapToGlobal(pos))
 
-    def iteritems(self, parent=None):
+    def iter_items(self, parent=None):
         if parent is None:
             parent = self.invisibleRootItem()
         for i in range(parent.childCount()):
             child = parent.child(i)
             yield child
-            for gc in self.iteritems(parent=child):
+            for gc in self.iter_items(parent=child):
                 yield gc
 
     def emit_navigate(self, *args):
diff --git a/src/calibre/library/catalogs/epub_mobi_builder.py b/src/calibre/library/catalogs/epub_mobi_builder.py
index 686345f767..868a250a30 100644
--- a/src/calibre/library/catalogs/epub_mobi_builder.py
+++ b/src/calibre/library/catalogs/epub_mobi_builder.py
@@ -42,7 +42,7 @@ from calibre.utils.icu import capitalize, collation_order, sort_key
 from calibre.utils.img import scale_image
 from calibre.utils.localization import get_lang, lang_as_iso639_1
 from calibre.utils.zipfile import ZipFile
-from polyglot.builtins import unicode_type
+from polyglot.builtins import unicode_type, iteritems
 
 NBSP = u'\u00a0'
 
@@ -2675,7 +2675,7 @@ class CatalogBuilder(object):
                         title_str=title_str,
                         xmlns=XHTML_NS,
                         )
-            for k, v in args.iteritems():
+            for k, v in iteritems(args):
                 if isbytestring(v):
                     args[k] = v.decode('utf-8')
             generated_html = P('catalog/template.xhtml',
@@ -4617,9 +4617,9 @@ class CatalogBuilder(object):
 
         templates = {}
         ef = P('catalog/section_list_templates.py')
-        with open(ef, 'rb')) as f:
+        with open(ef, 'rb') as f:
             exec(compile(f.read(), ef, 'exec'), templates)
-        for name, template in templates.iteritems():
+        for name, template in iteritems(templates):
             if name.startswith('by_') and name.endswith('_template'):
                 setattr(self, name, force_unicode(template, 'utf-8'))
 
diff --git a/src/calibre/srv/utils.py b/src/calibre/srv/utils.py
index 337803437c..aa79d5c147 100644
--- a/src/calibre/srv/utils.py
+++ b/src/calibre/srv/utils.py
@@ -15,7 +15,7 @@ from operator import itemgetter
 from binascii import hexlify, unhexlify
 
 from calibre import prints
-from calibre.constants import iswindows
+from calibre.constants import iswindows, ispy3
 from calibre.srv.errors import HTTPNotFound
 from calibre.utils.config_base import tweaks
 from calibre.utils.localization import get_translator
@@ -57,7 +57,8 @@ class MultiDict(dict):  # {{{
                 self[key] = val
 
     def items(self, duplicates=True):
-        for k, v in dict.iteritems(self):
+        f = dict.items if ispy3 else dict.iteritems
+        for k, v in f(self):
             if duplicates:
                 for x in v:
                     yield k, x
diff --git a/src/calibre/utils/exim.py b/src/calibre/utils/exim.py
index 9b422b6366..fbb16a518f 100644
--- a/src/calibre/utils/exim.py
+++ b/src/calibre/utils/exim.py
@@ -13,6 +13,7 @@ from calibre.constants import config_dir, iswindows, filesystem_encoding
 from calibre.utils.config_base import prefs, StringConfig, create_global_prefs
 from calibre.utils.config import JSONConfig
 from calibre.utils.filenames import samefile
+from polyglot.builtins import iteritems
 
 
 # Export {{{
@@ -175,11 +176,11 @@ def export(destdir, library_paths=None, dbmap=None, progress1=None, progress2=No
     if library_paths is None:
         library_paths = all_known_libraries()
     dbmap = dbmap or {}
-    dbmap = {os.path.normcase(os.path.abspath(k)):v for k, v in dbmap.iteritems()}
+    dbmap = {os.path.normcase(os.path.abspath(k)):v for k, v in iteritems(dbmap)}
     exporter = Exporter(destdir)
     exporter.metadata['libraries'] = libraries = {}
     total = len(library_paths) + 1
-    for i, (lpath, count) in enumerate(library_paths.iteritems()):
+    for i, (lpath, count) in enumerate(iteritems(library_paths)):
         if abort is not None and abort.is_set():
             return
         if progress1 is not None:
@@ -264,7 +265,7 @@ class Importer(object):
             raise ValueError('The last part of this exported data set is missing')
         if len(nums) != nums[-1]:
             raise ValueError('There are some parts of the exported data set missing')
-        self.part_map = {num:path for num, (path, is_last) in part_map.iteritems()}
+        self.part_map = {num:path for num, (path, is_last) in iteritems(part_map)}
         msf = struct.calcsize(Exporter.MDATA_SZ_FMT)
         offset = tail_size + msf
         with self.part(nums[-1]) as f:
@@ -323,7 +324,7 @@ def import_data(importer, library_path_map, config_location=None, progress1=None
     config_location = os.path.abspath(os.path.realpath(config_location))
     total = len(library_path_map) + 1
     library_usage_stats = Counter()
-    for i, (library_key, dest) in enumerate(library_path_map.iteritems()):
+    for i, (library_key, dest) in enumerate(iteritems(library_path_map)):
         if abort is not None and abort.is_set():
             return
         if progress1 is not None:
@@ -394,7 +395,7 @@ def run_exporter(export_dir=None, args=None):
             os.makedirs(export_dir)
         if os.listdir(export_dir):
             raise SystemExit('%s is not empty' % export_dir)
-        all_libraries = {os.path.normcase(os.path.abspath(path)):lus for path, lus in all_known_libraries().iteritems()}
+        all_libraries = {os.path.normcase(os.path.abspath(path)):lus for path, lus in iteritems(all_known_libraries())}
         if 'all' in args[1:]:
             libraries = set(all_libraries)
         else:
@@ -416,7 +417,7 @@ def run_exporter(export_dir=None, args=None):
     if os.listdir(export_dir):
         raise SystemExit('%s is not empty' % export_dir)
     library_paths = {}
-    for lpath, lus in all_known_libraries().iteritems():
+    for lpath, lus in iteritems(all_known_libraries()):
         if raw_input('Export the library %s [y/n]: ' % lpath).strip().lower() == b'y':
             library_paths[lpath] = lus
     if library_paths:
diff --git a/src/calibre/utils/fonts/sfnt/common.py b/src/calibre/utils/fonts/sfnt/common.py
index 59098e0472..96bcdc9cda 100644
--- a/src/calibre/utils/fonts/sfnt/common.py
+++ b/src/calibre/utils/fonts/sfnt/common.py
@@ -11,7 +11,7 @@ from struct import unpack_from, calcsize
 from collections import OrderedDict, namedtuple
 
 from calibre.utils.fonts.sfnt.errors import UnsupportedFont
-from polyglot.builtins import range
+from polyglot.builtins import range, iteritems
 
 
 class Unpackable(object):
@@ -82,7 +82,7 @@ class ListTable(OrderedDict):
     def dump(self, prefix=''):
         print (prefix, self.__class__.__name__, sep='')
         prefix += '  '
-        for tag, child in self.iteritems():
+        for tag, child in iteritems(self):
             print (prefix, tag, sep='')
             child.dump(prefix=prefix+'  ')
 
diff --git a/src/calibre/utils/fonts/sfnt/subset.py b/src/calibre/utils/fonts/sfnt/subset.py
index 388c3dd9a5..1af743c763 100644
--- a/src/calibre/utils/fonts/sfnt/subset.py
+++ b/src/calibre/utils/fonts/sfnt/subset.py
@@ -15,7 +15,7 @@ from functools import partial
 from calibre.utils.icu import safe_chr, ord_string
 from calibre.utils.fonts.sfnt.container import Sfnt
 from calibre.utils.fonts.sfnt.errors import UnsupportedFont, NoGlyphs
-from polyglot.builtins import unicode_type, range
+from polyglot.builtins import unicode_type, range, iteritems
 
 # TrueType outlines {{{
 
@@ -37,7 +37,7 @@ def resolve_glyphs(loca, glyf, character_map, extra_glyphs):
             if gid not in resolved_glyphs:
                 unresolved_glyphs.add(gid)
 
-    return OrderedDict(sorted(resolved_glyphs.iteritems(), key=itemgetter(0)))
+    return OrderedDict(sorted(iteritems(resolved_glyphs), key=itemgetter(0)))
 
 
 def subset_truetype(sfnt, character_map, extra_glyphs):
@@ -56,7 +56,7 @@ def subset_truetype(sfnt, character_map, extra_glyphs):
                 'set, subsetting it is pointless')
 
     # Keep only character codes that have resolved glyphs
-    for code, glyph_id in tuple(character_map.iteritems()):
+    for code, glyph_id in tuple(iteritems(character_map)):
         if glyph_id not in resolved_glyphs:
             del character_map[code]
 
@@ -360,7 +360,7 @@ def all():
             print()
     if warnings:
         print ('\n\nWarnings:')
-    for name, w in warnings.iteritems():
+    for name, w in iteritems(warnings):
         if w:
             print (name)
             print('', '\n\t'.join(w), sep='\t')
diff --git a/src/duktape/__init__.py b/src/duktape/__init__.py
index dfd96d7daf..c1e10543aa 100644
--- a/src/duktape/__init__.py
+++ b/src/duktape/__init__.py
@@ -201,7 +201,7 @@ class JSError(Exception):
                 if fn:
                     msg = type('')(fn) + ':' + msg
                 Exception.__init__(self, msg)
-                for k, v in e.iteritems():
+                for k, v in e.items():
                     if k != 'message':
                         setattr(self, k, v)
                     else:
@@ -230,7 +230,7 @@ contexts = {}
 def create_context(base_dirs, *args):
     data = to_python(args[0]) if args else {}
     ctx = Context(base_dirs=base_dirs)
-    for k, val in data.iteritems():
+    for k, val in data.items():
         setattr(ctx.g, k, val)
     key = id(ctx)
     contexts[key] = ctx
@@ -280,7 +280,7 @@ class Context(object):
         if (!String.prototype.trim) {
             (function() {
                 // Make sure we trim BOM and NBSP
-                var rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
+                var rtrim = /^[\\s\uFEFF\xA0]+|[\\s\uFEFF\xA0]+$/g;
                 String.prototype.trim = function() {
                 return this.replace(rtrim, '');
                 };
@@ -289,7 +289,7 @@ class Context(object):
         if (!String.prototype.trimLeft) {
             (function() {
                 // Make sure we trim BOM and NBSP
-                var rtrim = /^[\s\uFEFF\xA0]+/g;
+                var rtrim = /^[\\s\uFEFF\xA0]+/g;
                 String.prototype.trimLeft = function() {
                 return this.replace(rtrim, '');
                 };
@@ -298,7 +298,7 @@ class Context(object):
         if (!String.prototype.trimRight) {
             (function() {
                 // Make sure we trim BOM and NBSP
-                var rtrim = /[\s\uFEFF\xA0]+$/g;
+                var rtrim = /[\\s\uFEFF\xA0]+$/g;
                 String.prototype.trimRight = function() {
                 return this.replace(rtrim, '');
                 };
diff --git a/src/odf/odf2xhtml.py b/src/odf/odf2xhtml.py
index 00c038d278..b252bd256f 100644
--- a/src/odf/odf2xhtml.py
+++ b/src/odf/odf2xhtml.py
@@ -881,7 +881,7 @@ dl.notes dd:last-of-type { page-break-after: avoid }
         css_styles = {}
         for name in self.stylestack:
             styles = self.styledict.get(name)
-            css2 = tuple(self.cs.convert_styles(styles).iteritems())
+            css2 = tuple(self.cs.convert_styles(styles).items())
             if css2 in css_styles:
                 css_styles[css2].append(name)
             else:
@@ -902,7 +902,7 @@ dl.notes dd:last-of-type { page-break-after: avoid }
                 if k not in ignore:
                     yield k, v
 
-        for css2, names in css_styles.iteritems():
+        for css2, names in css_styles.items():
             self.writeout("%s {\n" % ', '.join(names))
             for style, val in filter_margins(css2):
                 self.writeout("\t%s: %s;\n" % (style, val))