autopep8

setup/plugins_mirror.py

@@ -374,10 +374,10 @@ def parallel_fetch(old_index, entry):
 
 
 def log(*args, **kwargs):
-    print (*args, **kwargs)
+    print(*args, **kwargs)
     with open('log', 'a') as f:
         kwargs['file'] = f
-        print (*args, **kwargs)
+        print(*args, **kwargs)
 
 
 def atomic_write(raw, name):
@@ -682,7 +682,7 @@ def test_parse():  # {{{
     new_entries = tuple(parse_index(raw))
     for i, entry in enumerate(old_entries):
         if entry != new_entries[i]:
-            print ('The new entry: %s != %s' % (new_entries[i], entry))
+            print('The new entry: %s != %s' % (new_entries[i], entry))
             raise SystemExit(1)
     pool = ThreadPool(processes=20)
     urls = [e.url for e in new_entries]
@@ -699,7 +699,7 @@ def test_parse():  # {{{
                 break
         new_url, aname = parse_plugin_zip_url(raw)
         if new_url != full_url:
-            print ('new url (%s): %s != %s for plugin at: %s' % (aname, new_url, full_url, url))
+            print('new url (%s): %s != %s for plugin at: %s' % (aname, new_url, full_url, url))
             raise SystemExit(1)
 
 # }}}

src/calibre/customize/ui.py

@@ -196,7 +196,7 @@ def run_plugins_on_postimport(db, book_id, fmt):
             try:
                 plugin.postimport(book_id, fmt, db)
             except:
-                print ('Running file type plugin %s failed with traceback:'%
+                print('Running file type plugin %s failed with traceback:'%
                        plugin.name)
                 traceback.print_exc()
 
@@ -211,7 +211,7 @@ def run_plugins_on_postadd(db, book_id, fmt_map):
             try:
                 plugin.postadd(book_id, fmt_map, db)
             except Exception:
-                print ('Running file type plugin %s failed with traceback:'%
+                print('Running file type plugin %s failed with traceback:'%
                        plugin.name)
                 traceback.print_exc()
 
@@ -728,7 +728,7 @@ def initialize_plugins(perf=False):
     sys.stdout, sys.stderr = ostdout, ostderr
     if perf:
         for x in sorted(times, key=lambda x:times[x]):
-            print ('%50s: %.3f'%(x, times[x]))
+            print('%50s: %.3f'%(x, times[x]))
     _initialized_plugins.sort(cmp=lambda x,y:cmp(x.priority, y.priority), reverse=True)
     reread_filetype_plugins()
     reread_metadata_plugins()

src/calibre/debug.py

@@ -347,7 +347,7 @@ def main(args=sys.argv):
             elif ext in {'mobi', 'azw', 'azw3'}:
                 inspect_mobi(path)
             else:
-                print ('Cannot dump unknown filetype: %s' % path)
+                print('Cannot dump unknown filetype: %s' % path)
     elif len(args) >= 2 and os.path.exists(os.path.join(args[1], '__main__.py')):
         sys.path.insert(0, args[1])
         run_script(os.path.join(args[1], '__main__.py'), args[2:])

src/calibre/devices/kobo/bookmark.py

@@ -12,6 +12,7 @@ class Bookmark():  # {{{
     A simple class fetching bookmark data
     kobo-specific
     '''
+
     def __init__(self, db_connection, contentid, path, id, book_format, bookmark_extension):
         self.book_format = book_format
         self.bookmark_extension = bookmark_extension

src/calibre/ebooks/docx/fields.py

@@ -39,6 +39,7 @@ class Field(object):
         self.instructions = ''.join(self.buf)
         del self.buf
 
+
 WORD, FLAG = 0, 1
 scanner = re.Scanner([
     (r'\\\S{1}', lambda s, t: (t, FLAG)),  # A flag of the form \x
@@ -77,6 +78,7 @@ def parser(name, field_map, default_field_name=None):
 
     return parse
 
+
 parse_hyperlink = parser('hyperlink',
     'l:anchor m:image-map n:target o:title t:target', 'url')
 
@@ -257,5 +259,6 @@ def test_parse_fields(return_tests=False):
         return suite
     unittest.TextTestRunner(verbosity=4).run(suite)
 
+
 if __name__ == '__main__':
     test_parse_fields()

src/calibre/ebooks/docx/numbering.py

@@ -37,6 +37,7 @@ def alphabet(val, lower=True):
     x = string.ascii_lowercase if lower else string.ascii_uppercase
     return x[(abs(val - 1)) % len(x)]
 
+
 alphabet_map = {
     'lower-alpha':alphabet, 'upper-alpha':partial(alphabet, lower=False),
     'lower-roman':lambda x:roman(x).lower(), 'upper-roman':roman,

src/calibre/ebooks/docx/writer/container.py

@@ -279,4 +279,4 @@ class DOCX(object):
 
 if __name__ == '__main__':
     d = DOCX(None, None)
-    print (d.websettings)
+    print(d.websettings)

src/calibre/ebooks/lrf/pylrs/pylrf.py

@@ -652,7 +652,7 @@ class LrfWriter(object):
         return self.sourceEncoding
 
     def toUnicode(self, string):
-        if type(string) is str:
+        if isinstance(string, str):
             string = string.decode(self.sourceEncoding)
 
         return string

src/calibre/ebooks/metadata/html.py

@@ -67,10 +67,10 @@ def parse_meta_tags(src):
     all_names = '|'.join(rmap)
     ans = {}
     npat = r'''name\s*=\s*['"]{0,1}(?P<name>%s)['"]{0,1}''' % all_names
-    cpat = 'content\s*=\s*%s' % attr_pat
+    cpat = r'content\s*=\s*%s' % attr_pat
     for pat in (
-        '<meta\s+%s\s+%s' % (npat, cpat),
-        '<meta\s+%s\s+%s' % (cpat, npat),
+        r'<meta\s+%s\s+%s' % (npat, cpat),
+        r'<meta\s+%s\s+%s' % (cpat, npat),
     ):
         for match in re.finditer(pat, src, flags=re.IGNORECASE):
             x = match.group('name').lower()

src/calibre/ebooks/mobi/debug/headers.py

@@ -599,7 +599,7 @@ class TextRecord(object):  # {{{
 
         for typ, val in iteritems(self.trailing_data):
             if isinstance(typ, numbers.Integral):
-                print ('Record %d has unknown trailing data of type: %d : %r'%
+                print('Record %d has unknown trailing data of type: %d : %r'%
                         (idx, typ, val))
 
         self.idx = idx

src/calibre/ebooks/mobi/reader/index.py

@@ -105,7 +105,7 @@ class CNCX(object):  # {{{
                     except:
                         byts = raw[pos:]
                         r = format_bytes(byts)
-                        print ('CNCX entry at offset %d has unknown format %s'%(
+                        print('CNCX entry at offset %d has unknown format %s'%(
                             pos+record_offset, r))
                         self.records[pos+record_offset] = r
                         pos = len(raw)
@@ -216,7 +216,7 @@ def parse_index_record(table, data, control_byte_count, tags, codec,
     header = parse_indx_header(data)
     idxt_pos = header['start']
     if data[idxt_pos:idxt_pos+4] != b'IDXT':
-        print ('WARNING: Invalid INDX record')
+        print('WARNING: Invalid INDX record')
     entry_count = header['count']
 
     # loop through to build up the IDXT position starts

src/calibre/ebooks/oeb/polish/container.py

@@ -1530,7 +1530,7 @@ def test_roundtrip():
     ebook3 = get_container(p.name)
     diff = ebook3.compare_to(ebook2)
     if diff is not None:
-        print (diff)
+        print(diff)
 
 
 if __name__ == '__main__':

src/calibre/ebooks/oeb/polish/import_book.py

@@ -65,5 +65,6 @@ def import_book_as_epub(srcpath, destpath, log=default_log):
             for name in c.name_path_map:
                 zf.writestr(name, c.raw_data(name, decode=False))
 
+
 if __name__ == '__main__':
     import_book_as_epub(sys.argv[-2], sys.argv[-1])

src/calibre/ebooks/oeb/polish/tests/base.py

@@ -89,6 +89,7 @@ def get_split_book(fmt='epub'):
             os.remove(x)
     return ans
 
+
 devnull = DevNull()
 
 

src/calibre/ebooks/oeb/polish/tests/parsing.py

@@ -220,4 +220,4 @@ def timing():
             f(raw)
             timings.append(monotonic() - st)
         avg = sum(timings)/len(timings)
-        print ('Average time for %s: %.2g' % (name, avg))
+        print('Average time for %s: %.2g' % (name, avg))

src/calibre/ebooks/txt/processor.py

@@ -121,7 +121,7 @@ def create_markdown_object(extensions):
             if hasattr(module, 'makeExtension'):
                 return module.makeExtension(**configs)
             for name, x in vars(module).items():
-                if type(x) is type and issubclass(x, Extension) and x is not Extension:
+                if isinstance(x, type) and issubclass(x, Extension) and x is not Extension:
                     return x(**configs)
             raise ImportError('No extension class in {}'.format(ext_name))
 

src/calibre/gui2/email.py

@@ -506,4 +506,4 @@ class EmailMixin(object):  # {{{
 if __name__ == '__main__':
     from PyQt5.Qt import QApplication
     app = QApplication([])  # noqa
-    print (select_recipients())
+    print(select_recipients())

src/calibre/gui2/library/alternate_views.py

@@ -957,7 +957,7 @@ class GridView(QListView):
                 # rendered, but this is better than a deadlock
                 join_with_timeout(self.delegate.render_queue)
             except RuntimeError:
-                print ('Cover rendering thread is stuck!')
+                print('Cover rendering thread is stuck!')
             finally:
                 self.ignore_render_requests.clear()
         else:

src/calibre/gui2/library/caches.py

@@ -46,7 +46,7 @@ class CoverCache(dict):
 
     def _pop(self, book_id):
         val = self.items.pop(book_id, None)
-        if type(val) is QPixmap and current_thread() is not self.gui_thread:
+        if isinstance(val, QPixmap) and current_thread() is not self.gui_thread:
             self.pixmap_staging.append(val)
 
     def __getitem__(self, key):
@@ -55,7 +55,7 @@ class CoverCache(dict):
             self.clear_staging()
             ans = self.items.pop(key, False)  # pop() so that item is moved to the top
             if ans is not False:
-                if type(ans) is QImage:
+                if isinstance(ans, QImage):
                     # Convert to QPixmap, since rendering QPixmap is much
                     # faster
                     ans = QPixmap.fromImage(ans)
@@ -73,7 +73,7 @@ class CoverCache(dict):
     def clear(self):
         with self.lock:
             if current_thread() is not self.gui_thread:
-                pixmaps = (x for x in itervalues(self.items) if type(x) is QPixmap)
+                pixmaps = (x for x in itervalues(self.items) if isinstance(x, QPixmap))
                 self.pixmap_staging.extend(pixmaps)
             self.items.clear()
 

src/calibre/gui2/preferences/coloring.py

@@ -1130,8 +1130,8 @@ if __name__ == '__main__':
         kind, col, r = d.rule
 
         print('Column to be colored:', col)
-        print ('Template:')
-        print (r.template)
+        print('Template:')
+        print(r.template)
     else:
         d = EditRules()
         d.resize(QSize(800, 600))

src/calibre/gui2/preferences/misc.py

@@ -68,6 +68,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         from calibre.utils.config import config_dir
         open_local_file(config_dir)
 
+
 if __name__ == '__main__':
     from PyQt5.Qt import QApplication
     app = QApplication([])

src/calibre/gui2/tag_browser/model.py

@@ -374,7 +374,7 @@ class TagsModel(QAbstractItemModel):  # {{{
 
     def rebuild_node_tree(self, state_map={}):
         if self._build_in_progress:
-            print ('Tag browser build already in progress')
+            print('Tag browser build already in progress')
             traceback.print_stack()
             return
         # traceback.print_stack()
@@ -474,7 +474,7 @@ class TagsModel(QAbstractItemModel):  # {{{
         intermediate_nodes = {}
 
         if data is None:
-            print ('_create_node_tree: no data!')
+            print('_create_node_tree: no data!')
             traceback.print_stack()
             return
 
@@ -1011,7 +1011,7 @@ class TagsModel(QAbstractItemModel):  # {{{
             if not isinstance(order, dict):
                 raise TypeError()
         except:
-            print ('Tweak tag_browser_category_order is not valid. Ignored')
+            print('Tweak tag_browser_category_order is not valid. Ignored')
             order = {'*': 100}
         defvalue = order.get('*', 100)
         self.row_map = sorted(self.categories, key=lambda x: order.get(x, defvalue))
@@ -1031,7 +1031,7 @@ class TagsModel(QAbstractItemModel):  # {{{
         Here to trap usages of refresh in the old architecture. Can eventually
         be removed.
         '''
-        print ('TagsModel: refresh called!')
+        print('TagsModel: refresh called!')
         traceback.print_stack()
         return False
 

src/calibre/gui2/tweak_book/diff/main.py

@@ -139,7 +139,7 @@ def string_diff(left, right, left_syntax=None, right_syntax=None, left_name='lef
 
 def file_diff(left, right):
     (raw1, syntax1), (raw2, syntax2) = map(get_decoded_raw, (left, right))
-    if type(raw1) is not type(raw2):
+    if not isinstance(raw1, type(raw2)):
         raw1, raw2 = open(left, 'rb').read(), open(right, 'rb').read()
     cache = Cache()
     cache.set_left(left, raw1), cache.set_right(right, raw2)

src/calibre/gui2/tweak_book/editor/syntax/css.py

@@ -269,6 +269,7 @@ def in_string(state, text, i, formats, user_data):
     state.parse = (NORMAL if state.blocks < 1 else IN_CONTENT)
     return [(pos - i + len(q), formats['string'])]
 
+
 state_map = {
     NORMAL:normal,
     IN_COMMENT_NORMAL: comment,

src/calibre/gui2/tweak_book/editor/themes.py

@@ -32,6 +32,7 @@ def default_theme():
         _default_theme = 'wombat-dark' if isdark else 'pyte-light'
     return _default_theme
 
+
 # The solarized themes {{{
 SLDX = {'base03':'1c1c1c', 'base02':'262626', 'base01':'585858', 'base00':'626262', 'base0':'808080', 'base1':'8a8a8a', 'base2':'e4e4e4', 'base3':'ffffd7', 'yellow':'af8700', 'orange':'d75f00', 'red':'d70000', 'magenta':'af005f', 'violet':'5f5faf', 'blue':'0087ff', 'cyan':'00afaf', 'green':'5f8700'}  # noqa
 SLD  = {'base03':'002b36', 'base02':'073642', 'base01':'586e75', 'base00':'657b83', 'base0':'839496', 'base1':'93a1a1', 'base2':'eee8d5', 'base3':'fdf6e3', 'yellow':'b58900', 'orange':'cb4b16', 'red':'dc322f', 'magenta':'d33682', 'violet':'6c71c4', 'blue':'268bd2', 'cyan':'2aa198', 'green':'859900'}  # noqa

src/calibre/gui2/tweak_book/reports.py

@@ -1338,7 +1338,7 @@ class ReportsWidget(QWidget):
             self.stack.widget(i)(data)
             if DEBUG:
                 category = self.reports.item(i).data(Qt.DisplayRole)
-                print ('Widget time for %12s: %.2fs seconds' % (category, time.time() - st))
+                print('Widget time for %12s: %.2fs seconds' % (category, time.time() - st))
 
     def save(self):
         save_state('splitter-state', bytearray(self.splitter.saveState()))
@@ -1440,7 +1440,7 @@ class Reports(Dialog):
         data, timing = data
         if DEBUG:
             for x, t in sorted(iteritems(timing), key=itemgetter(1)):
-                print ('Time for %6s data: %.3f seconds' % (x, t))
+                print('Time for %6s data: %.3f seconds' % (x, t))
         self.reports(data)
 
     def accept(self):

src/calibre/gui2/tweak_book/search.py

@@ -569,8 +569,7 @@ class SearchesModel(QAbstractListModel):
     def dropMimeData(self, data, action, row, column, parent):
         if parent.isValid() or action != Qt.MoveAction or not data.hasFormat('x-calibre/searches-rows') or not self.filtered_searches:
             return False
-        rows = map(int, bytes(bytearray(data.data('x-calibre/searches-rows'))).decode('ascii').split(','))
-        rows.sort()
+        rows = sorted(map(int, bytes(bytearray(data.data('x-calibre/searches-rows'))).decode('ascii').split(',')))
         moved_searches = [self.searches[self.filtered_searches[r]] for r in rows]
         moved_searches_q = {id(s) for s in moved_searches}
         insert_at = max(0, min(row, len(self.filtered_searches)))

src/calibre/gui2/viewer/javascript.py

@@ -50,7 +50,7 @@ class JavaScriptLoader(object):
                 compile_coffeescript
             except:
                 self._dynamic_coffeescript = False
-                print ('WARNING: Failed to load serve_coffee, not compiling '
+                print('WARNING: Failed to load serve_coffee, not compiling '
                         'coffeescript dynamically.')
 
         self._cache = {}

src/calibre/linux.py

@@ -652,7 +652,7 @@ class PostInstall:
         print('\n'+'_'*20, 'WARNING','_'*20)
         prints(*args, **kwargs)
         print('_'*50)
-        print ('\n')
+        print('\n')
         self.warnings.append((args, kwargs))
         sys.stdout.flush()
 

src/calibre/spell/import_from.py

@@ -144,5 +144,6 @@ def import_from_oxt(source_path, name, dest_dir=None, prefix='dic-'):
             num += 1
     return num
 
+
 if __name__ == '__main__':
     import_from_libreoffice_source_tree(sys.argv[-1])

src/calibre/srv/render_book.py

@@ -388,6 +388,7 @@ def split_name(name):
         return l[1:], r
     return None, l
 
+
 boolean_attributes = frozenset('allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,default,defaultchecked,defaultmuted,defaultselected,defer,disabled,enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,required,reversed,scoped,seamless,selected,sortable,truespeed,typemustmatch,visible'.split(','))  # noqa
 
 EPUB_TYPE_MAP = {k:'doc-' + k for k in (

src/calibre/utils/dbus_service.py

@@ -142,6 +142,7 @@ class dbus_property(object):
     def setter(self, fset):
         return self._copy(fset=fset)
 
+
 _logger = logging.getLogger('dbus.service')
 
 

src/calibre/utils/fonts/sfnt/cmap.py

@@ -208,8 +208,7 @@ class CmapTable(UnknownTable):
         if self.bmp_table is None:
             raise UnsupportedFont('This font has no Windows BMP cmap subtable.'
                     ' Most likely a special purpose font.')
-        chars = list(set(chars))
-        chars.sort()
+        chars = sorted(set(chars))
         ans = OrderedDict()
         for i, glyph_id in enumerate(self.bmp_table.get_glyph_ids(chars)):
             if glyph_id > 0:
@@ -230,8 +229,7 @@ class CmapTable(UnknownTable):
     def set_character_map(self, cmap):
         self.version, self.num_tables = 0, 1
         fmt = b'>7H'
-        codes = list(iterkeys(cmap))
-        codes.sort()
+        codes = sorted(iterkeys(cmap))
 
         if not codes:
             start_code = [0xffff]

src/calibre/utils/fonts/sfnt/container.py

@@ -167,6 +167,7 @@ def test_roundtrip(ff=None):
         raise ValueError('Roundtripping failed, size different (%d vs. %d)'%
                          (len(data), len(rd)))
 
+
 if __name__ == '__main__':
     import sys
     test_roundtrip(sys.argv[-1])

src/calibre/utils/fonts/sfnt/gsub.py

@@ -132,6 +132,7 @@ class ReverseChainSingleSubstitution(UnknownLookupSubTable):
         gid_index_map = self.coverage.coverage_indices(glyph_ids)
         return {self.substitutes[i] for i in itervalues(gid_index_map)}
 
+
 subtable_map = {
         1: SingleSubstitution,
         2: MultipleSubstitution,

src/calibre/utils/fonts/utils.py

@@ -489,12 +489,12 @@ def test():
 def main():
     import sys, os
     for f in sys.argv[1:]:
-        print (os.path.basename(f))
+        print(os.path.basename(f))
         raw = open(f, 'rb').read()
-        print (get_font_names(raw))
+        print(get_font_names(raw))
         characs = get_font_characteristics(raw)
-        print (characs)
-        print (panose_to_css_generic_family(characs[5]))
+        print(characs)
+        print(panose_to_css_generic_family(characs[5]))
         verify_checksums(raw)
         remove_embed_restriction(raw)
 

src/calibre/utils/fonts/win_fonts.py

@@ -150,7 +150,7 @@ def load_winfonts():
 def test_ttf_reading():
     for f in sys.argv[1:]:
         raw = open(f).read()
-        print (os.path.basename(f))
+        print(os.path.basename(f))
         get_font_characteristics(raw)
         print()
 
@@ -166,15 +166,16 @@ def test():
     else:
         w = load_winfonts()
 
-    print (w.w)
+    print(w.w)
     families = w.font_families()
-    print (families)
+    print(families)
 
     for family in families:
         prints(family + ':')
         for font, data in iteritems(w.fonts_for_family(family)):
             prints('  ', font, data[0], data[1], len(data[2]))
-        print ()
+        print()
+
 
 if __name__ == '__main__':
     test()

src/calibre/utils/ipc/pool.py

@@ -399,7 +399,7 @@ def run_main(func):
 
 
 def test_write():
-    print ('Printing to stdout in worker')
+    print('Printing to stdout in worker')
 
 
 def test():
@@ -408,8 +408,8 @@ def test():
         while not p.results.empty():
             r = p.results.get()
             if not ignore_fail and r.is_terminal_failure:
-                print (r.result.err)
-                print (r.result.traceback)
+                print(r.result.err)
+                print(r.result.traceback)
                 raise SystemExit(1)
             ans[r.id] = r.result
         return ans
@@ -487,4 +487,4 @@ def test():
         p(i, 'import time;\ndef x(i):\n time.sleep(10000)', 'x', i)
     p.shutdown(), p.join()
 
-    print ('Tests all passed!')
+    print('Tests all passed!')

src/calibre/utils/localization.py

@@ -189,7 +189,7 @@ def load_po(path):
     try:
         make(path, buf)
     except Exception:
-        print (('Failed to compile translations file: %s, ignoring') % path)
+        print(('Failed to compile translations file: %s, ignoring') % path)
         buf = None
     else:
         buf = io.BytesIO(buf.getvalue())

src/calibre/utils/localunzip.py

@@ -316,5 +316,6 @@ class LocalZipFile(object):
             shutil.copyfileobj(temp, zipstream)
             zipstream.flush()
 
+
 if __name__ == '__main__':
     extractall(sys.argv[-1])

src/calibre/utils/resources.py

@@ -98,7 +98,7 @@ def _compile_coffeescript(name):
         cs, errors = compile_coffeescript(f.read(), src)
         if errors:
             for line in errors:
-                print (line)
+                print(line)
             raise Exception('Failed to compile coffeescript'
                     ': %s'%src)
         return cs

src/calibre/utils/unicode_names.py

@@ -39,4 +39,6 @@ def points_for_word(w):
         ans = plugins['unicode_names'][0].codepoints_for_word(w.encode('utf-8')) | html_entities().get(w, set())
         points_for_word.cache[w] = ans
     return ans
+
+
 points_for_word.cache = {}  # noqa

src/calibre/web/feeds/recipes/collection.py

@@ -93,7 +93,7 @@ def serialize_builtin_recipes():
             try:
                 recipe_class = compile_recipe(stream.read())
             except:
-                print ('Failed to compile: %s'%f)
+                print('Failed to compile: %s'%f)
                 raise
         if recipe_class is not None:
             recipe_mapping['builtin:'+rid] = recipe_class

src/css_selectors/select.py

@@ -27,6 +27,7 @@ xpath_cache = OrderedDict()
 # Test that the string is not empty and does not contain whitespace
 is_non_whitespace = re.compile(r'^[^ \t\r\n\f]+$').match
 
+
 def get_parsed_selector(raw):
     try:
         return parse_cache[raw]
@@ -36,6 +37,7 @@ def get_parsed_selector(raw):
             parse_cache.pop(next(iter(parse_cache)))
         return ans
 
+
 def get_compiled_xpath(expr):
     try:
         return xpath_cache[expr]
@@ -45,12 +47,16 @@ def get_compiled_xpath(expr):
             xpath_cache.pop(next(iter(xpath_cache)))
         return ans
 
+
 class AlwaysIn(object):
 
     def __contains__(self, x):
         return True
+
+
 always_in = AlwaysIn()
 
+
 def trace_wrapper(func):
     @wraps(func)
     def trace(*args, **kwargs):
@@ -59,6 +65,7 @@ def trace_wrapper(func):
         return func(*args, **kwargs)
     return trace
 
+
 def normalize_language_tag(tag):
     """Return a list of normalized combinations for a `BCP 47` language tag.
 
@@ -80,9 +87,11 @@ def normalize_language_tag(tag):
             taglist.add('-'.join(base_tag + tags))
     return taglist
 
+
 INAPPROPRIATE_PSEUDO_CLASSES = frozenset([
     'active', 'after', 'disabled', 'visited', 'link', 'before', 'focus', 'first-letter', 'enabled', 'first-line', 'hover', 'checked', 'target'])
 
+
 class Select(object):
 
     '''
@@ -325,6 +334,7 @@ class Select(object):
 
 # Combinators {{{
 
+
 def select_combinedselector(cache, combined):
     """Translate a combined selector."""
     combinator = cache.combinator_mapping[combined.combinator]
@@ -334,6 +344,7 @@ def select_combinedselector(cache, combined):
     for item in cache.dispatch_map[combinator](cache, cache.iterparsedselector(combined.selector), right):
         yield item
 
+
 def select_descendant(cache, left, right):
     """right is a child, grand-child or further descendant of left"""
     right = always_in if right is None else frozenset(right)
@@ -342,6 +353,7 @@ def select_descendant(cache, left, right):
             if descendant in right:
                 yield descendant
 
+
 def select_child(cache, left, right):
     """right is an immediate child of left"""
     right = always_in if right is None else frozenset(right)
@@ -350,6 +362,7 @@ def select_child(cache, left, right):
             if child in right:
                 yield child
 
+
 def select_direct_adjacent(cache, left, right):
     """right is a sibling immediately after left"""
     right = always_in if right is None else frozenset(right)
@@ -359,6 +372,7 @@ def select_direct_adjacent(cache, left, right):
                 yield sibling
             break
 
+
 def select_indirect_adjacent(cache, left, right):
     """right is a sibling after left, immediately or not"""
     right = always_in if right is None else frozenset(right)
@@ -368,6 +382,7 @@ def select_indirect_adjacent(cache, left, right):
                 yield sibling
 # }}}
 
+
 def select_element(cache, selector):
     """A type or universal selector."""
     element = selector.element
@@ -378,6 +393,7 @@ def select_element(cache, selector):
         for elem in cache.element_map[ascii_lower(element)]:
             yield elem
 
+
 def select_hash(cache, selector):
     'An id selector'
     items = cache.id_map[ascii_lower(selector.id)]
@@ -386,6 +402,7 @@ def select_hash(cache, selector):
             if elem in items:
                 yield elem
 
+
 def select_class(cache, selector):
     'A class selector'
     items = cache.class_map[ascii_lower(selector.class_name)]
@@ -394,6 +411,7 @@ def select_class(cache, selector):
             if elem in items:
                 yield elem
 
+
 def select_negation(cache, selector):
     'Implement :not()'
     exclude = frozenset(cache.iterparsedselector(selector.subselector))
@@ -403,6 +421,7 @@ def select_negation(cache, selector):
 
 # Attribute selectors {{{
 
+
 def select_attrib(cache, selector):
     operator = cache.attribute_operator_mapping[selector.operator]
     items = frozenset(cache.dispatch_map[operator](cache, ascii_lower(selector.attrib), selector.value))
@@ -410,20 +429,24 @@ def select_attrib(cache, selector):
         if item in items:
             yield item
 
+
 def select_exists(cache, attrib, value=None):
     for elem_set in itervalues(cache.attrib_map[attrib]):
         for elem in elem_set:
             yield elem
 
+
 def select_equals(cache, attrib, value):
     for elem in cache.attrib_map[attrib][value]:
         yield elem
 
+
 def select_includes(cache, attrib, value):
     if is_non_whitespace(value):
         for elem in cache.attrib_space_map[attrib][value]:
             yield elem
 
+
 def select_dashmatch(cache, attrib, value):
     if value:
         for val, elem_set in iteritems(cache.attrib_map[attrib]):
@@ -431,6 +454,7 @@ def select_dashmatch(cache, attrib, value):
                 for elem in elem_set:
                     yield elem
 
+
 def select_prefixmatch(cache, attrib, value):
     if value:
         for val, elem_set in iteritems(cache.attrib_map[attrib]):
@@ -438,6 +462,7 @@ def select_prefixmatch(cache, attrib, value):
                 for elem in elem_set:
                     yield elem
 
+
 def select_suffixmatch(cache, attrib, value):
     if value:
         for val, elem_set in iteritems(cache.attrib_map[attrib]):
@@ -445,6 +470,7 @@ def select_suffixmatch(cache, attrib, value):
                 for elem in elem_set:
                     yield elem
 
+
 def select_substringmatch(cache, attrib, value):
     if value:
         for val, elem_set in iteritems(cache.attrib_map[attrib]):
@@ -456,6 +482,7 @@ def select_substringmatch(cache, attrib, value):
 
 # Function selectors {{{
 
+
 def select_function(cache, function):
     """Select with a functional pseudo-class."""
     fname = function.name.replace('-', '_')
@@ -474,6 +501,7 @@ def select_function(cache, function):
             if func(cache, function, item):
                 yield item
 
+
 def select_lang(cache, function):
     ' Implement :lang() '
     if function.argument_types() not in (['STRING'], ['IDENT']):
@@ -487,6 +515,7 @@ def select_lang(cache, function):
                 for elem in elem_set:
                     yield elem
 
+
 def select_nth_child(cache, function, elem):
     ' Implement :nth-child() '
     a, b = function.parsed_arguments
@@ -499,6 +528,7 @@ def select_nth_child(cache, function, elem):
     n = (num - b) / a
     return n.is_integer() and n > -1
 
+
 def select_nth_last_child(cache, function, elem):
     ' Implement :nth-last-child() '
     a, b = function.parsed_arguments
@@ -511,6 +541,7 @@ def select_nth_last_child(cache, function, elem):
     n = (num - b) / a
     return n.is_integer() and n > -1
 
+
 def select_nth_of_type(cache, function, elem):
     ' Implement :nth-of-type() '
     a, b = function.parsed_arguments
@@ -523,6 +554,7 @@ def select_nth_of_type(cache, function, elem):
     n = (num - b) / a
     return n.is_integer() and n > -1
 
+
 def select_nth_last_of_type(cache, function, elem):
     ' Implement :nth-last-of-type() '
     a, b = function.parsed_arguments
@@ -539,6 +571,7 @@ def select_nth_last_of_type(cache, function, elem):
 
 # Pseudo elements {{{
 
+
 def select_pseudo(cache, pseudo):
     try:
         func = cache.dispatch_map[pseudo.ident.replace('-', '_')]
@@ -565,50 +598,71 @@ def select_pseudo(cache, pseudo):
         if func(cache, item):
             yield item
 
+
 def select_first_child(cache, elem):
     try:
         return cache.sibling_count(elem) == 0
     except ValueError:
         return False
+
+
 select_first_child.is_pseudo = True
 
+
 def select_last_child(cache, elem):
     try:
         return cache.sibling_count(elem, before=False) == 0
     except ValueError:
         return False
+
+
 select_last_child.is_pseudo = True
 
+
 def select_only_child(cache, elem):
     try:
         return cache.all_sibling_count(elem) == 0
     except ValueError:
         return False
+
+
 select_only_child.is_pseudo = True
 
+
 def select_first_of_type(cache, elem):
     try:
         return cache.sibling_count(elem, same_type=True) == 0
     except ValueError:
         return False
+
+
 select_first_of_type.is_pseudo = True
 
+
 def select_last_of_type(cache, elem):
     try:
         return cache.sibling_count(elem, before=False, same_type=True) == 0
     except ValueError:
         return False
+
+
 select_last_of_type.is_pseudo = True
 
+
 def select_only_of_type(cache, elem):
     try:
         return cache.all_sibling_count(elem, same_type=True) == 0
     except ValueError:
         return False
+
+
 select_only_of_type.is_pseudo = True
 
+
 def select_empty(cache, elem):
     return cache.is_empty(elem)
+
+
 select_empty.is_pseudo = True
 
 # }}}

src/tinycss/__init__.py

@@ -47,6 +47,7 @@ def make_parser(*features, **kwargs):
         parser_class = CSS21Parser
     return parser_class(**kwargs)
 
+
 def make_full_parser(**kwargs):
     ''' A parser that parses all supported CSS 3 modules in addition to CSS 2.1 '''
     features = tuple(iterkeys(PARSER_MODULES))

src/tinycss/tests/fonts3.py

@@ -11,6 +11,7 @@ from tinycss.tests import BaseTest
 
 from polyglot.builtins import iteritems
 
+
 class TestFonts3(BaseTest):
 
     def test_font_face(self):