pep8

recipes/al_monitor.recipe

@@ -162,7 +162,7 @@ class AlMonitor(BasicNewsRecipe):
     def scrape_article_date(self, soup):
         for span in soup.findAll('span'):
             txt = self.text(span)
-            rgx = re.compile('Posted ([a-zA-Z]+ \d\d?, \d\d\d\d).*')
+            rgx = re.compile(unicode(r'Posted ([a-zA-Z]+ \d\d?, \d\d\d\d).*'))
             hit = rgx.match(txt)
             if hit:
                 return self.date_from_string(txt)

recipes/appledaily_tw.recipe

@@ -106,5 +106,5 @@ class AppledailyTW(BasicNewsRecipe):
     def preprocess_raw_html(self, raw_html, url):
         raw_html = re.sub(unicode(r'<a href=".*?<br><br>.*?<\/a>'), '', raw_html)
         raw_html = re.sub(
-            unicode(r'<title>(.*?)[\s]+\|.*<\/title>', '<title>\1<\/title>'), raw_html)
+            unicode(r'<title>(.*?)[\\s]+\|.*<\/title>', r'<title>\1<\/title>'), raw_html)
         return raw_html

recipes/daily_express.recipe

@@ -78,7 +78,7 @@ class AdvancedUserRecipe1390132023(BasicNewsRecipe):
             'http://cdn.images.express.co.uk/img/covers/')})
         cov = str(cov)
         cov2 = re.findall(
-            'http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', cov)
+            'http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+', cov)
 
         cov = str(cov2)
         cov = cov[2:len(cov) - 2]

recipes/film_web.recipe

@@ -22,7 +22,7 @@ class FilmWebPl(BasicNewsRecipe):
                       'ul.sep-line > li + li::before {content: " | "} '
                       'ul.inline {padding:0px;} .vertical-align {display: inline-block;}')
     preprocess_regexps = [(re.compile(r'<body.+?</head>', re.DOTALL), lambda match: ''),  # fix malformed HTML with 2 body tags...
-    (re.compile(u'(?:<sup>)?\(kliknij\,\ aby powiększyć\)(?:</sup>)?', re.IGNORECASE), lambda m: ''),
+    (re.compile(u'(?:<sup>)?\\(kliknij\\,\\ aby powiększyć\\)(?:</sup>)?', re.IGNORECASE), lambda m: ''),
     (re.compile(unicode(r'(<br ?/?>\s*?<br ?/?>\s*?)+'), re.IGNORECASE), lambda m: '<br />')
     ]
     remove_tags = [dict(attrs={'class':['infoParent', 'likeBar',

recipes/huffingtonpost.recipe

@@ -62,7 +62,7 @@ class HuffingtonPostRecipe(BasicNewsRecipe):
 
     remove_tags = []
     remove_tags.append(dict(name='a', attrs={'href': re.compile(
-        'http://feedads\.g\.doubleclick.net.*')}))
+        'http://feedads\\.g\\.doubleclick.net.*')}))
     remove_tags.append(dict(name='div', attrs={'class': 'feedflare'}))
     remove_tags.append(dict(name='a', attrs={'class': 'home_pixie'}))
     remove_tags.append(dict(name='div', attrs={'id': [

recipes/lenta_ru.recipe

@@ -144,7 +144,7 @@ class LentaRURecipe(BasicNewsRecipe):
 
         # Place article date after header
         dates = soup.findAll(text=re.compile(
-            '\d{2}\.\d{2}\.\d{4}, \d{2}:\d{2}:\d{2}'))
+            r'\d{2}\.\d{2}\.\d{4}, \d{2}:\d{2}:\d{2}'))
         if dates:
             for date in dates:
                 for string in date:

recipes/lwn_weekly.recipe

@@ -121,7 +121,7 @@ class WeeklyLWN(BasicNewsRecipe):
                 if article_anchor:
                     article_url = article_anchor.get('href')
                     if not article_url:
-                        print('article_url is None for article_anchor "%s": "%s"' \
+                        print('article_url is None for article_anchor "%s": "%s"'
                             % (str(article_anchor), article_title), file=sys.stderr)
                         continue
 

recipes/metro_news_nl.recipe

@@ -84,11 +84,11 @@ class AdvancedUserRecipe1306097511(BasicNewsRecipe):
     remove_tags = [
         dict(name=['iframe', 'script', 'noscript', 'style']),
         dict(name='div', attrs={'class': ['fact-related-box', 'aside clearfix', 'aside clearfix middle-col-line', 'comments', 'share-tools', 'article-right-column', 'column-4-5', 'column-1-5', 'ad-msg', 'col-179 ', 'col-373 ', 'clear', 'ad', 'navigation', re.compile('share-tools(-top)?'), 'tools', 'metroCommentFormWrap', 'article-tools-below-title', 'related-links', 'padding-top-15', re.compile('^promo.*?$'), 'teaser-component', re.compile('fb(-comments|_iframe_widget)'), 'promos', 'header-links', 'promo-2']}),  # noqa
-        dict(id=['super-carousel', 'article-2', 'googleads', 'column-1-5-bottom', 'column-4-5', re.compile('^ad(\d+|adcomp.*?)?$'), 'adadcomp-4', 'margin-5', 'sidebar', re.compile('^article-\d'), 'comments', 'gallery-1', 'sharez_container', 'ts-container', 'topshares', 'ts-title']),  # noqa
+        dict(id=['super-carousel', 'article-2', 'googleads', 'column-1-5-bottom', 'column-4-5', re.compile('^ad(\\d+|adcomp.*?)?$'), 'adadcomp-4', 'margin-5', 'sidebar', re.compile('^article-\\d'), 'comments', 'gallery-1', 'sharez_container', 'ts-container', 'topshares', 'ts-title']),  # noqa
         dict(name='a', attrs={'name': 'comments'}),
         dict(name='img', attrs={'class': 'top-line',
                                 'title': 'volledig scherm'}),
-        dict(attrs={'style': re.compile('^(.*(display\s?:\s?none|img-mask|white)\s?;?.*)$'), 'title': 'volledig scherm'})]
+        dict(attrs={'style': re.compile('^(.*(display\\s?:\\s?none|img-mask|white)\\s?;?.*)$'), 'title': 'volledig scherm'})]
 
     '''removed by before/after:
         id:
@@ -223,7 +223,7 @@ class MerryProcess(BeautifulSoup):
         return self.myKiller.safeRemovePart(souparray, True)
 
     def removeEmptyTags(self, soup, run=0):
-        emptymatches = re.compile('^[ \s\n\r\t ]*$')
+        emptymatches = re.compile('^[ \\s\n\r\t ]*$')
         emptytags = soup.findAll(lambda tag: tag.find(True) is None and (
             tag.string is None or tag.string.strip() == "" or tag.string.strip() == emptymatches) and not tag.isSelfClosing)
         if emptytags and not (emptytags is None or emptytags == []):

recipes/observatorul_cultural.recipe

@@ -29,7 +29,7 @@ class ObservatorulCultural(BasicNewsRecipe):
         soup = self.index_to_soup(
             'http://www.observatorcultural.ro/Arhiva*-archive.html')
         issueTag = soup.find('a', href=re.compile(
-            "observatorcultural.ro\/Numarul"))
+            "observatorcultural.ro\\/Numarul"))
         issueURL = issueTag['href']
         print(issueURL)
         issueSoup = self.index_to_soup(issueURL)

src/calibre/customize/zipplugin.py

@@ -83,6 +83,7 @@ def get_icons(zfp, name_or_list_of_names):
         ians = ians.pop(names[0])
     return ians
 
+
 _translations_cache = {}
 
 
@@ -316,4 +317,3 @@ if __name__ == '__main__':
                             zf.write(os.path.join(x, y))
         add_plugin(f.name)
         print('Added plugin from', sys.argv[-1])
-

src/calibre/db/tests/profiling.py

@@ -40,5 +40,6 @@ def main():
     show_stats(stats)
     print('Stats saved to', stats)
 
+
 if __name__ == '__main__':
     main()

src/calibre/devices/cli.py

@@ -395,5 +395,6 @@ def main():
 
     return 0
 
+
 if __name__ == '__main__':
     main()

src/calibre/devices/mtp/windows/remote.py

@@ -95,6 +95,6 @@ def main():
 
     print('Device connection shutdown')
 
+
 if __name__ == '__main__':
     main()
-

src/calibre/devices/udisks.py

@@ -211,7 +211,6 @@ def test_udisks(ver=None):
     print('Ejecting:')
     u.eject(dev)
 
+
 if __name__ == '__main__':
     test_udisks()
-
-

src/calibre/devices/winusb.py

@@ -53,6 +53,7 @@ class GUID(Structure):
             ''.join(["%02x" % d for d in self.data4[2:]]),
         )
 
+
 CONFIGRET = DWORD
 DEVINST = DWORD
 LPDWORD = POINTER(DWORD)
@@ -70,6 +71,8 @@ def CTL_CODE(DeviceType, Function, Method, Access):
 def USB_CTL(id):
     # CTL_CODE(FILE_DEVICE_USB, (id), METHOD_BUFFERED, FILE_ANY_ACCESS)
     return CTL_CODE(0x22, id, 0, 0)
+
+
 IOCTL_USB_GET_ROOT_HUB_NAME = USB_CTL(258)
 IOCTL_USB_GET_NODE_INFORMATION = USB_CTL(258)
 IOCTL_USB_GET_NODE_CONNECTION_INFORMATION = USB_CTL(259)
@@ -108,6 +111,7 @@ class SP_DEVINFO_DATA(Structure):
     def __str__(self):
         return "ClassGuid:%s DevInst:%s" % (self.ClassGuid, self.DevInst)
 
+
 PSP_DEVINFO_DATA = POINTER(SP_DEVINFO_DATA)
 
 
@@ -122,6 +126,7 @@ class SP_DEVICE_INTERFACE_DATA(Structure):
     def __str__(self):
         return "InterfaceClassGuid:%s Flags:%s" % (self.InterfaceClassGuid, self.Flags)
 
+
 ANYSIZE_ARRAY = 1
 
 
@@ -131,6 +136,7 @@ class SP_DEVICE_INTERFACE_DETAIL_DATA(Structure):
         ("DevicePath", c_wchar*ANYSIZE_ARRAY)
     ]
 
+
 UCHAR = c_ubyte
 
 
@@ -216,6 +222,7 @@ class USB_DESCRIPTOR_REQUEST(Structure):
         ('Data', USB_STRING_DESCRIPTOR),
     )
 
+
 PUSB_DESCRIPTOR_REQUEST = POINTER(USB_DESCRIPTOR_REQUEST)
 PSP_DEVICE_INTERFACE_DETAIL_DATA = POINTER(SP_DEVICE_INTERFACE_DETAIL_DATA)
 PSP_DEVICE_INTERFACE_DATA = POINTER(SP_DEVICE_INTERFACE_DATA)
@@ -390,6 +397,7 @@ def config_err_check(result, func, args):
         raise WindowsError(result, 'The cfgmgr32 function failed with err: %s' % CR_CODE_NAMES.get(result, result))
     return args
 
+
 GetLogicalDrives = cwrap('GetLogicalDrives', DWORD, errcheck=bool_err_check, lib=kernel32)
 GetDriveType = cwrap('GetDriveTypeW', UINT, LPCWSTR, lib=kernel32)
 GetVolumeNameForVolumeMountPoint = cwrap('GetVolumeNameForVolumeMountPointW', BOOL, LPCWSTR, LPWSTR, DWORD, errcheck=bool_err_check, lib=kernel32)
@@ -675,6 +683,7 @@ def get_volume_pathnames(volume_id, buf=None):
 
 # def scan_usb_devices(): {{{
 
+
 _USBDevice = namedtuple('USBDevice', 'vendor_id product_id bcd devid devinst')
 
 
@@ -1017,6 +1026,7 @@ def drives_for(vendor_id, product_id=None):
             pprint(get_drive_letters_for_device(usbdev, debug=True))
             print('USB info:', get_usb_info(usbdev, debug=True))
 
+
 if __name__ == '__main__':
     develop()
 # }}}

src/calibre/ebooks/conversion/utils.py

@@ -32,11 +32,11 @@ class HeuristicProcessor(object):
         self.multi_blank = re.compile(r'(\s*<p[^>]*>\s*</p>(\s*<div[^>]*>\s*</div>\s*)*){2,}(?!\s*<h\d)', re.IGNORECASE)
         self.any_multi_blank = re.compile(r'(\s*<p[^>]*>\s*</p>(\s*<div[^>]*>\s*</div>\s*)*){2,}', re.IGNORECASE)
         self.line_open = "<(?P<outer>p|div)[^>]*>\s*(<(?P<inner1>font|span|[ibu])[^>]*>)?\s*(<(?P<inner2>font|span|[ibu])[^>]*>)?\s*(<(?P<inner3>font|span|[ibu])[^>]*>)?\s*"  # noqa
-        self.line_close = "(</(?P=inner3)>)?\s*(</(?P=inner2)>)?\s*(</(?P=inner1)>)?\s*</(?P=outer)>"
+        self.line_close = "(</(?P=inner3)>)?\\s*(</(?P=inner2)>)?\\s*(</(?P=inner1)>)?\\s*</(?P=outer)>"
         self.single_blank = re.compile(r'(\s*<(p|div)[^>]*>\s*</(p|div)>)', re.IGNORECASE)
         self.scene_break_open = '<p class="scenebreak" style="text-align:center; text-indent:0%; margin-top:1em; margin-bottom:1em; page-break-before:avoid">'
-        self.common_in_text_endings = u'[\"\'—’”,\.!\?\…\)„\w]'
+        self.common_in_text_endings = u'[\"\'—’”,\\.!\\?\\…\\)„\\w]'
-        self.common_in_text_beginnings = u'[\w\'\"“‘‛]'
+        self.common_in_text_beginnings = u'[\\w\'\"“‘‛]'
 
     def is_pdftohtml(self, src):
         return '<!-- created by calibre\'s pdftohtml -->' in src[:1000]
@@ -54,10 +54,10 @@ class HeuristicProcessor(object):
                     " chapters. - " + unicode(chap))
             return '<h2>'+chap+'</h2>\n'
         else:
-            delete_whitespace = re.compile('^\s*(?P<c>.*?)\s*$')
+            delete_whitespace = re.compile('^\\s*(?P<c>.*?)\\s*$')
             delete_quotes = re.compile('\'\"')
-            txt_chap = delete_quotes.sub('', delete_whitespace.sub('\g<c>', html2text(chap)))
+            txt_chap = delete_quotes.sub('', delete_whitespace.sub('\\g<c>', html2text(chap)))
-            txt_title = delete_quotes.sub('', delete_whitespace.sub('\g<c>', html2text(title)))
+            txt_title = delete_quotes.sub('', delete_whitespace.sub('\\g<c>', html2text(title)))
             self.html_preprocess_sections = self.html_preprocess_sections + 1
             self.log.debug("marked " + unicode(self.html_preprocess_sections) +
                     " chapters & titles. - " + unicode(chap) + ", " + unicode(title))
@@ -216,24 +216,24 @@ class HeuristicProcessor(object):
         title_line_open = "<(?P<outer2>p|div)[^>]*>\s*(<(?P<inner4>font|span|[ibu])[^>]*>)?\s*(<(?P<inner5>font|span|[ibu])[^>]*>)?\s*(<(?P<inner6>font|span|[ibu])[^>]*>)?\s*"  # noqa
         chapter_header_open = r"(?P<chap>"
         title_header_open = r"(?P<title>"
-        chapter_header_close = ")\s*"
+        chapter_header_close = ")\\s*"
         title_header_close = ")"
         chapter_line_close = self.line_close
-        title_line_close = "(</(?P=inner6)>)?\s*(</(?P=inner5)>)?\s*(</(?P=inner4)>)?\s*</(?P=outer2)>"
+        title_line_close = "(</(?P=inner6)>)?\\s*(</(?P=inner5)>)?\\s*(</(?P=inner4)>)?\\s*</(?P=outer2)>"
 
         is_pdftohtml = self.is_pdftohtml(html)
         if is_pdftohtml:
-            title_line_open = "<(?P<outer2>p)[^>]*>\s*"
+            title_line_open = "<(?P<outer2>p)[^>]*>\\s*"
-            title_line_close = "\s*</(?P=outer2)>"
+            title_line_close = "\\s*</(?P=outer2)>"
 
         if blanks_between_paragraphs:
-            blank_lines = "(\s*<p[^>]*>\s*</p>){0,2}\s*"
+            blank_lines = "(\\s*<p[^>]*>\\s*</p>){0,2}\\s*"
         else:
             blank_lines = ""
         opt_title_open = "("
         opt_title_close = ")?"
-        n_lookahead_open = "(?!\s*"
+        n_lookahead_open = "(?!\\s*"
-        n_lookahead_close = ")\s*"
+        n_lookahead_close = ")\\s*"
 
         default_title = r"(<[ibu][^>]*>)?\s{0,3}(?!Chapter)([\w\:\'’\"-]+\s{0,3}){1,5}?(</[ibu][^>]*>)?(?=<)"
         simple_title = r"(<[ibu][^>]*>)?\s{0,3}(?!(Chapter|\s+<)).{0,65}?(</[ibu][^>]*>)?(?=<)"
@@ -358,12 +358,12 @@ class HeuristicProcessor(object):
 
         # define the pieces of the regex
         # (?<!\&\w{4});) is a semicolon not part of an entity
-        lookahead = "(?<=.{"+unicode(length)+u"}([a-zა-ჰäëïöüàèìòùáćéíĺóŕńśúýâêîôûçąężıãõñæøþðßěľščťžňďřů,:)\IA\u00DF]|(?<!\&\w{4});))"
+        lookahead = "(?<=.{"+unicode(length)+u"}([a-zა-ჰäëïöüàèìòùáćéíĺóŕńśúýâêîôûçąężıãõñæøþðßěľščťžňďřů,:)\\IA\u00DF]|(?<!\\&\\w{4});))"
         em_en_lookahead = "(?<=.{"+unicode(length)+u"}[\u2013\u2014])"
         soft_hyphen = u"\xad"
-        line_ending = "\s*(?P<style_close></(span|[iub])>)?\s*(</(p|div)>)?"
+        line_ending = "\\s*(?P<style_close></(span|[iub])>)?\\s*(</(p|div)>)?"
-        blanklines = "\s*(?P<up2threeblanks><(p|span|div)[^>]*>\s*(<(p|span|div)[^>]*>\s*</(span|p|div)>\s*)</(span|p|div)>\s*){0,3}\s*"
+        blanklines = "\\s*(?P<up2threeblanks><(p|span|div)[^>]*>\\s*(<(p|span|div)[^>]*>\\s*</(span|p|div)>\\s*)</(span|p|div)>\\s*){0,3}\\s*"
-        line_opening = "<(p|div)[^>]*>\s*(?P<style_open><(span|[iub])[^>]*>)?\s*"
+        line_opening = "<(p|div)[^>]*>\\s*(?P<style_open><(span|[iub])[^>]*>)?\\s*"
         txt_line_wrap = u"((\u0020|\u0009)*\n){1,4}"
 
         if format == 'txt':
@@ -414,8 +414,8 @@ class HeuristicProcessor(object):
         return html
 
     def arrange_htm_line_endings(self, html):
-        html = re.sub(r"\s*</(?P<tag>p|div)>", "</"+"\g<tag>"+">\n", html)
+        html = re.sub(r"\s*</(?P<tag>p|div)>", "</"+"\\g<tag>"+">\n", html)
-        html = re.sub(r"\s*<(?P<tag>p|div)(?P<style>[^>]*)>\s*", "\n<"+"\g<tag>"+"\g<style>"+">", html)
+        html = re.sub(r"\s*<(?P<tag>p|div)(?P<style>[^>]*)>\s*", "\n<"+"\\g<tag>"+"\\g<style>"+">", html)
         return html
 
     def fix_nbsp_indents(self, html):
@@ -432,7 +432,7 @@ class HeuristicProcessor(object):
         # Get rid of empty <o:p> tags to simplify other processing
         html = re.sub(unicode(r'\s*<o:p>\s*</o:p>'), ' ', html)
         # Delete microsoft 'smart' tags
-        html = re.sub('(?i)</?st1:\w+>', '', html)
+        html = re.sub('(?i)</?st1:\\w+>', '', html)
         # Re-open self closing paragraph tags
         html = re.sub('<p[^>/]*/>', '<p> </p>', html)
         # Get rid of empty span, bold, font, em, & italics tags
@@ -443,7 +443,7 @@ class HeuristicProcessor(object):
             html = re.sub(
                 r"\s*{open}\s*({open}\s*{close}\s*){{0,2}}\s*{close}".format(open=open_fmt_pat, close=close_fmt_pat) , " ", html)
         # delete surrounding divs from empty paragraphs
-        html = re.sub('<div[^>]*>\s*<p[^>]*>\s*</p>\s*</div>', '<p> </p>', html)
+        html = re.sub('<div[^>]*>\\s*<p[^>]*>\\s*</p>\\s*</div>', '<p> </p>', html)
         # Empty heading tags
         html = re.sub(r'(?i)<h\d+>\s*</h\d+>', '', html)
         self.deleted_nbsps = True
@@ -527,7 +527,7 @@ class HeuristicProcessor(object):
             elif content.find('scenebreak') != -1:
                 return content
             else:
-                content = re.sub('(?i)<h(?P<hnum>\d+)[^>]*>', '\n\n<h'+'\g<hnum>'+' style="'+top_margin+bottom_margin+'">', content)
+                content = re.sub('(?i)<h(?P<hnum>\\d+)[^>]*>', '\n\n<h'+'\\g<hnum>'+' style="'+top_margin+bottom_margin+'">', content)
             return content
 
         html = blanks_around_headings.sub(merge_header_whitespace, html)
@@ -540,15 +540,15 @@ class HeuristicProcessor(object):
 
         html = blanks_n_nopunct.sub(markup_whitespaces, html)
         if self.html_preprocess_sections > self.min_chapters:
-            html = re.sub('(?si)^.*?(?=<h\d)', markup_whitespaces, html)
+            html = re.sub('(?si)^.*?(?=<h\\d)', markup_whitespaces, html)
 
         return html
 
     def detect_soft_breaks(self, html):
-        line = '(?P<initline>'+self.line_open+'\s*(?P<init_content>.*?)'+self.line_close+')'
+        line = '(?P<initline>'+self.line_open+'\\s*(?P<init_content>.*?)'+self.line_close+')'
         line_two = '(?P<line_two>'+re.sub('(ou|in|cha)', 'linetwo_', self.line_open)+ \
-                     '\s*(?P<line_two_content>.*?)'+re.sub('(ou|in|cha)', 'linetwo_', self.line_close)+')'
+                     '\\s*(?P<line_two_content>.*?)'+re.sub('(ou|in|cha)', 'linetwo_', self.line_close)+')'
-        div_break_candidate_pattern = line+'\s*<div[^>]*>\s*</div>\s*'+line_two
+        div_break_candidate_pattern = line+'\\s*<div[^>]*>\\s*</div>\\s*'+line_two
         div_break_candidate = re.compile(r'%s' % div_break_candidate_pattern, re.IGNORECASE|re.UNICODE)
 
         def convert_div_softbreaks(match):
@@ -571,9 +571,9 @@ class HeuristicProcessor(object):
 
     def detect_scene_breaks(self, html):
         scene_break_regex = self.line_open+'(?!('+self.common_in_text_beginnings+'|.*?'+self.common_in_text_endings+ \
-                                             '<))(?P<break>((?P<break_char>((?!\s)\W))\s*(?P=break_char)?)+)\s*'+self.line_close
+                                             '<))(?P<break>((?P<break_char>((?!\\s)\\W))\\s*(?P=break_char)?)+)\\s*'+self.line_close
         scene_breaks = re.compile(r'%s' % scene_break_regex, re.IGNORECASE|re.UNICODE)
-        html = scene_breaks.sub(self.scene_break_open+'\g<break>'+'</p>', html)
+        html = scene_breaks.sub(self.scene_break_open+'\\g<break>'+'</p>', html)
         return html
 
     def markup_user_break(self, replacement_break):
@@ -589,13 +589,13 @@ class HeuristicProcessor(object):
             if re.match('^<hr', replacement_break):
                 if replacement_break.find('width') != -1:
                     try:
-                        width = int(re.sub('.*?width(:|=)(?P<wnum>\d+).*', '\g<wnum>', replacement_break))
+                        width = int(re.sub('.*?width(:|=)(?P<wnum>\\d+).*', '\\g<wnum>', replacement_break))
                     except:
                         scene_break = hr_open+'<hr style="height: 3px; background:#505050" /></div>'
                         self.log.warn('Invalid replacement scene break'
                                 ' expression, using default')
                     else:
-                        replacement_break = re.sub('(?i)(width=\d+\%?|width:\s*\d+(\%|px|pt|em)?;?)', '', replacement_break)
+                        replacement_break = re.sub('(?i)(width=\\d+\\%?|width:\\s*\\d+(\\%|px|pt|em)?;?)', '', replacement_break)
                         divpercent = (100 - width) / 2
                         hr_open = re.sub('45', unicode(divpercent), hr_open)
                         scene_break = hr_open+replacement_break+'</div>'
@@ -606,16 +606,16 @@ class HeuristicProcessor(object):
             else:
                 from calibre.utils.html2text import html2text
                 replacement_break = html2text(replacement_break)
-                replacement_break = re.sub('\s', '&nbsp;', replacement_break)
+                replacement_break = re.sub('\\s', '&nbsp;', replacement_break)
                 scene_break = self.scene_break_open+replacement_break+'</p>'
         else:
-            replacement_break = re.sub('\s', '&nbsp;', replacement_break)
+            replacement_break = re.sub('\\s', '&nbsp;', replacement_break)
             scene_break = self.scene_break_open+replacement_break+'</p>'
 
         return scene_break
 
     def check_paragraph(self, content):
-        content = re.sub('\s*</?span[^>]*>\s*', '', content)
+        content = re.sub('\\s*</?span[^>]*>\\s*', '', content)
         if re.match('.*[\"\'.!?:]$', content):
             # print "detected this as a paragraph"
             return True
@@ -623,7 +623,7 @@ class HeuristicProcessor(object):
             return False
 
     def abbyy_processor(self, html):
-        abbyy_line = re.compile('((?P<linestart><p\sstyle="(?P<styles>[^\"]*?);?">)(?P<content>.*?)(?P<lineend></p>)|(?P<image><img[^>]*>))', re.IGNORECASE)
+        abbyy_line = re.compile('((?P<linestart><p\\sstyle="(?P<styles>[^\"]*?);?">)(?P<content>.*?)(?P<lineend></p>)|(?P<image><img[^>]*>))', re.IGNORECASE)
         empty_paragraph = '\n<p> </p>\n'
         self.in_blockquote = False
         self.previous_was_paragraph = False
@@ -669,7 +669,7 @@ class HeuristicProcessor(object):
                     if style == 'text-align' and setting != 'left':
                         text_align = style+':'+setting+';'
                     if style == 'text-indent':
-                        setting = int(re.sub('\s*pt\s*', '', setting))
+                        setting = int(re.sub('\\s*pt\\s*', '', setting))
                         if 9 < setting < 14:
                             text_indent = indented_text
                         else:
@@ -757,8 +757,8 @@ class HeuristicProcessor(object):
 
         is_pdftohtml = self.is_pdftohtml(html)
         if is_pdftohtml:
-            self.line_open = "<(?P<outer>p)[^>]*>(\s*<[ibu][^>]*>)?\s*"
+            self.line_open = "<(?P<outer>p)[^>]*>(\\s*<[ibu][^>]*>)?\\s*"
-            self.line_close = "\s*(</[ibu][^>]*>\s*)?</(?P=outer)>"
+            self.line_close = "\\s*(</[ibu][^>]*>\\s*)?</(?P=outer)>"
 
         # ADE doesn't render <br />, change to empty paragraphs
         # html = re.sub('<br[^>]*>', u'<p>\u00a0</p>', html)
@@ -831,7 +831,7 @@ class HeuristicProcessor(object):
             # headings and titles, images, etc
             doubleheading = re.compile(
                 r'(?P<firsthead><h(1|2)[^>]*>.+?</h(1|2)>\s*(<(?!h\d)[^>]*>\s*)*)<h(1|2)(?P<secondhead>[^>]*>.+?)</h(1|2)>', re.IGNORECASE)
-            html = doubleheading.sub('\g<firsthead>'+'\n<h3'+'\g<secondhead>'+'</h3>', html)
+            html = doubleheading.sub('\\g<firsthead>'+'\n<h3'+'\\g<secondhead>'+'</h3>', html)
 
         # If scene break formatting is enabled, find all blank paragraphs that definitely aren't scenebreaks,
         # style it with the 'whitespace' class.  All remaining blank lines are styled as softbreaks.
@@ -839,7 +839,7 @@ class HeuristicProcessor(object):
         # If non-blank scene breaks exist they are center aligned and styled with appropriate margins.
         if getattr(self.extra_opts, 'format_scene_breaks', False):
             self.log.debug('Formatting scene breaks')
-            html = re.sub('(?i)<div[^>]*>\s*<br(\s?/)?>\s*</div>', '<p></p>', html)
+            html = re.sub('(?i)<div[^>]*>\\s*<br(\\s?/)?>\\s*</div>', '<p></p>', html)
             html = self.detect_scene_breaks(html)
             html = self.detect_whitespace(html)
             html = self.detect_soft_breaks(html)
@@ -856,9 +856,9 @@ class HeuristicProcessor(object):
                 replacement_break = self.markup_user_break(replacement_break)
                 if scene_break_count >= 1:
                     html = detected_scene_break.sub(replacement_break, html)
-                    html = re.sub('<p\s+class="softbreak"[^>]*>\s*</p>', replacement_break, html)
+                    html = re.sub('<p\\s+class="softbreak"[^>]*>\\s*</p>', replacement_break, html)
                 else:
-                    html = re.sub('<p\s+class="softbreak"[^>]*>\s*</p>', replacement_break, html)
+                    html = re.sub('<p\\s+class="softbreak"[^>]*>\\s*</p>', replacement_break, html)
 
         if self.deleted_nbsps:
             # put back non-breaking spaces in empty paragraphs so they render correctly

src/calibre/ebooks/docx/dump.py

@@ -41,6 +41,6 @@ def dump(path):
 
     print(path, 'dumped to', dest)
 
+
 if __name__ == '__main__':
     dump(sys.argv[-1])
-

src/calibre/ebooks/epub/cfi/parse.py

@@ -165,6 +165,7 @@ class Parser(object):
             ans['text_assertion'] = ta
         return raw[1:]
 
+
 _parser = None
 
 
@@ -203,5 +204,3 @@ def cfi_sort_key(cfi, only_path=True):
     step = steps[-1] if steps else {}
     offsets = (step.get('temporal_offset', 0), tuple(reversed(step.get('spatial_offset', (0, 0)))), step.get('text_offset', 0), )
     return (step_nums, offsets)
-
-

src/calibre/ebooks/epub/cfi/tests.py

@@ -100,5 +100,6 @@ class Tests(unittest.TestCase):
 def find_tests():
     return unittest.TestLoader().loadTestsFromTestCase(Tests)
 
+
 if __name__ == '__main__':
     unittest.TextTestRunner(verbosity=2).run(find_tests())

src/calibre/ebooks/lit/from_any.py

@@ -62,5 +62,6 @@ def main(args=sys.argv):
     any2lit(opts, args[1])
     return 0
 
+
 if __name__ == '__main__':
     sys.exit(main())

src/calibre/ebooks/lit/mssha1.py

@@ -104,6 +104,7 @@ def f60_79(B, C, D):
 def f6_42(B, C, D):
     return (B + C) ^ C
 
+
 f = [f0_19]*20 + [f20_39]*20 + [f40_59]*20 + [f60_79]*20
 
 # ...and delightful changes
@@ -321,6 +322,7 @@ def new(arg=None):
 
     return crypto
 
+
 if __name__ == '__main__':
     def main():
         import sys

src/calibre/ebooks/lit/writer.py

@@ -57,6 +57,7 @@ def invert_tag_map(tag_map):
     tattrs[0] = dattrs
     return tags, tattrs
 
+
 OPF_MAP = invert_tag_map(maps.OPF_MAP)
 HTML_MAP = invert_tag_map(maps.HTML_MAP)
 
@@ -76,6 +77,7 @@ def packguid(guid):
     values = [int(value, 16) for value in values]
     return pack("<LHHBBBBBBBB", *values)
 
+
 FLAG_OPENING = (1 << 0)
 FLAG_CLOSING = (1 << 1)
 FLAG_BLOCK = (1 << 2)

src/calibre/ebooks/lrf/html/convert_from.py

@@ -153,9 +153,9 @@ class HTMLConverter(object):
                      (re.compile('<hr>', re.IGNORECASE),
                       lambda match : '<span style="page-break-after:always"> </span>'),
                      # Create header tags
-                     (re.compile('<h2[^><]*?id=BookTitle[^><]*?(align=)*(?(1)(\w+))*[^><]*?>[^><]*?</h2>', re.IGNORECASE),
+                     (re.compile('<h2[^><]*?id=BookTitle[^><]*?(align=)*(?(1)(\\w+))*[^><]*?>[^><]*?</h2>', re.IGNORECASE),
                       lambda match : '<h1 id="BookTitle" align="%s">%s</h1>'%(match.group(2) if match.group(2) else 'center', match.group(3))),
-                     (re.compile('<h2[^><]*?id=BookAuthor[^><]*?(align=)*(?(1)(\w+))*[^><]*?>[^><]*?</h2>', re.IGNORECASE),
+                     (re.compile('<h2[^><]*?id=BookAuthor[^><]*?(align=)*(?(1)(\\w+))*[^><]*?>[^><]*?</h2>', re.IGNORECASE),
                       lambda match : '<h2 id="BookAuthor" align="%s">%s</h2>'%(match.group(2) if match.group(2) else 'center', match.group(3))),
                      (re.compile('<span[^><]*?id=title[^><]*?>(.*?)</span>', re.IGNORECASE|re.DOTALL),
                       lambda match : '<h2 class="title">%s</h2>'%(match.group(1),)),
@@ -409,7 +409,7 @@ class HTMLConverter(object):
         selector name and the value is a dictionary of properties
         """
         sdict, pdict = {}, {}
-        style = re.sub('/\*.*?\*/', '', style)  # Remove /*...*/ comments
+        style = re.sub('/\\*.*?\\*/', '', style)  # Remove /*...*/ comments
         for sel in re.findall(HTMLConverter.SELECTOR_PAT, style):
             for key in sel[0].split(','):
                 val = self.parse_style_properties(sel[1])

src/calibre/ebooks/metadata/sources/overdrive.py

@@ -148,7 +148,7 @@ class OverDrive(Source):
         fix_slashes = re.compile(r'\\/')
         thumbimage = fix_slashes.sub('/', thumbimage)
         worldcatlink = fix_slashes.sub('/', worldcatlink)
-        cover_url = re.sub('(?P<img>(Ima?g(eType-)?))200', '\g<img>100', thumbimage)
+        cover_url = re.sub('(?P<img>(Ima?g(eType-)?))200', '\\g<img>100', thumbimage)
         social_metadata_url = base_url+'TitleInfo.aspx?ReserveID='+reserveid+'&FormatID='+formatid
         series_num = ''
         if not series:
@@ -254,7 +254,7 @@ class OverDrive(Source):
 
     def sort_ovrdrv_results(self, raw, log, title=None, title_tokens=None, author=None, author_tokens=None, ovrdrv_id=None):
         close_matches = []
-        raw = re.sub('.*?\[\[(?P<content>.*?)\]\].*', '[[\g<content>]]', raw)
+        raw = re.sub('.*?\\[\\[(?P<content>.*?)\\]\\].*', '[[\\g<content>]]', raw)
         results = json.loads(raw)
         # log.error('raw results are:'+str(results))
         # The search results are either from a keyword search or a multi-format list from a single ID,

src/calibre/ebooks/metadata/sources/ozon.py

@@ -149,7 +149,7 @@ class Ozon(Source):
                 # Redirect page: trying to extract ozon_id from javascript data
                 h = HTMLParser()
                 entry_string = (h.unescape(etree.tostring(doc, pretty_print=True, encoding=unicode)))
-                json_pat = re.compile(u'dataLayer\s*=\s*(.+)?;')
+                json_pat = re.compile(r'dataLayer\s*=\s*(.+)?;')
                 json_info = re.search(json_pat, entry_string)
                 jsondata = json_info.group(1) if json_info else None
                 if jsondata:
@@ -344,7 +344,7 @@ class Ozon(Source):
 
         pub_year = None
         pub_year_block = entry.xpath(u'.//div[@class="bOneTileProperty"]/text()')
-        year_pattern = re.compile('\d{4}')
+        year_pattern = re.compile(r'\d{4}')
         if pub_year_block:
             pub_year = re.search(year_pattern, pub_year_block[0])
             if pub_year:
@@ -625,8 +625,8 @@ def _translageLanguageToCode(displayLang):  # {{{
 def _normalizeAuthorNameWithInitials(name):  # {{{
     res = name
     if name:
-        re1 = u'^(?P<lname>\S+)\s+(?P<fname>[^\d\W]\.)(?:\s*(?P<mname>[^\d\W]\.))?$'
+        re1 = r'^(?P<lname>\S+)\s+(?P<fname>[^\d\W]\.)(?:\s*(?P<mname>[^\d\W]\.))?$'
-        re2 = u'^(?P<fname>[^\d\W]\.)(?:\s*(?P<mname>[^\d\W]\.))?\s+(?P<lname>\S+)$'
+        re2 = r'^(?P<fname>[^\d\W]\.)(?:\s*(?P<mname>[^\d\W]\.))?\s+(?P<lname>\S+)$'
         matcher = re.match(re1, unicode(name), re.UNICODE)
         if not matcher:
             matcher = re.match(re2, unicode(name), re.UNICODE)

src/calibre/ebooks/metadata/topaz.py

@@ -370,6 +370,7 @@ def set_metadata(stream, mi):
     mu.update(mi)
     return
 
+
 if __name__ == '__main__':
     if False:
         # Test get_metadata()
@@ -388,4 +389,3 @@ if __name__ == '__main__':
         updated_data = open(tokens[0]+'-updated' + '.' + tokens[2],'wb')
         updated_data.write(stream.getvalue())
         updated_data.close()
-

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

@@ -45,6 +45,6 @@ def inspect_mobi(path_or_stream, ddir=None):  # {{{
 def main():
     inspect_mobi(sys.argv[1])
 
+
 if __name__ == '__main__':
     main()
-

src/calibre/ebooks/mobi/reader/mobi6.py

@@ -350,13 +350,13 @@ class MobiReader(object):
         # Swap inline and block level elements, and order block level elements according to priority
         # - lxml and beautifulsoup expect/assume a specific order based on xhtml spec
         self.processed_html = re.sub(
-            r'(?i)(?P<styletags>(<(h\d+|i|b|u|em|small|big|strong|tt)>\s*){1,})(?P<para><p[^>]*>)', '\g<para>'+'\g<styletags>', self.processed_html)
+            r'(?i)(?P<styletags>(<(h\d+|i|b|u|em|small|big|strong|tt)>\s*){1,})(?P<para><p[^>]*>)', '\\g<para>'+'\\g<styletags>', self.processed_html)
         self.processed_html = re.sub(
-            r'(?i)(?P<para></p[^>]*>)\s*(?P<styletags>(</(h\d+|i|b|u|em|small|big|strong|tt)>\s*){1,})', '\g<styletags>'+'\g<para>', self.processed_html)
+            r'(?i)(?P<para></p[^>]*>)\s*(?P<styletags>(</(h\d+|i|b|u|em|small|big|strong|tt)>\s*){1,})', '\\g<styletags>'+'\\g<para>', self.processed_html)
         self.processed_html = re.sub(
-            r'(?i)(?P<blockquote>(</(blockquote|div)[^>]*>\s*){1,})(?P<para></p[^>]*>)', '\g<para>'+'\g<blockquote>', self.processed_html)
+            r'(?i)(?P<blockquote>(</(blockquote|div)[^>]*>\s*){1,})(?P<para></p[^>]*>)', '\\g<para>'+'\\g<blockquote>', self.processed_html)
         self.processed_html = re.sub(
-            r'(?i)(?P<para><p[^>]*>)\s*(?P<blockquote>(<(blockquote|div)[^>]*>\s*){1,})', '\g<blockquote>'+'\g<para>', self.processed_html)
+            r'(?i)(?P<para><p[^>]*>)\s*(?P<blockquote>(<(blockquote|div)[^>]*>\s*){1,})', '\\g<blockquote>'+'\\g<para>', self.processed_html)
         bods = htmls = 0
         for x in re.finditer(u'</body>|</html>', self.processed_html):
             if x == '</body>':
@@ -692,7 +692,7 @@ class MobiReader(object):
                         continue
                     if reached and x.tag == 'a':
                         href = x.get('href', '')
-                        if href and re.match('\w+://', href) is None:
+                        if href and re.match('\\w+://', href) is None:
                             try:
                                 text = u' '.join([t.strip() for t in
                                     x.xpath('descendant::text()')])

src/calibre/ebooks/mobi/writer8/index.py

@@ -374,6 +374,7 @@ class NonLinearNCXIndex(NCXIndex):
         EndTagTable
     )))
 
+
 if __name__ == '__main__':
     # Generate a document with a large number of index entries using both
     # calibre and kindlegen and compare the output
@@ -393,4 +394,3 @@ if __name__ == '__main__':
 
     from calibre.gui2.tweak_book.diff.main import main
     main(['cdiff', 'decompiled_index/mobi8/ncx.record', 'x/ncx.record'])
-

src/calibre/ebooks/oeb/normalize_css.py

@@ -114,6 +114,7 @@ def normalize_simple_composition(name, cssvalue, composition, check_inherit=True
                     break
     return style
 
+
 font_composition = ('font-style', 'font-variant', 'font-weight', 'font-size', 'line-height', 'font-family')
 
 
@@ -144,6 +145,7 @@ def normalize_border(name, cssvalue):
         style.update({k.replace(EDGES[0], edge):v for k, v in vals.iteritems()})
     return style
 
+
 normalizers = {
     'list-style': simple_normalizer('list-style', ('type', 'position', 'image')),
     'font': lambda prop, v: normalize_font(v),
@@ -243,6 +245,7 @@ def condense_border(style, props):
             style.removeProperty(prop.name)
         style.setProperty('border', edge_vals[0].value)
 
+
 condensers = {'margin': simple_condenser('margin', condense_edge), 'padding': simple_condenser('padding', condense_edge), 'border': condense_border}
 
 
@@ -430,5 +433,6 @@ def test_normalization(return_tests=False):  # {{{
     unittest.TextTestRunner(verbosity=4).run(tests)
 # }}}
 
+
 if __name__ == '__main__':
     test_normalization()

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

@@ -82,6 +82,7 @@ def iterrules(container, sheet_name, rules=None, media_rule_ok=media_allowed, ru
 
     importing.discard(sheet_name)
 
+
 StyleDeclaration = namedtuple('StyleDeclaration', 'index declaration pseudo_element')
 Specificity = namedtuple('Specificity', 'is_style num_id num_class num_elem rule_index')
 
@@ -224,6 +225,7 @@ def resolve_styles(container, name, select=None, sheet_callback=None):
 
     return partial(resolve_property, style_map), partial(resolve_pseudo_property, style_map, pseudo_style_map), select
 
+
 _defvals = None
 
 

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

@@ -115,6 +115,7 @@ def create_book(mi, path, fmt='epub', opf_name='metadata.opf', html_name='start.
             zf.writestr(html_name, HTML)
             zf.writestr(toc_name, ncx)
 
+
 if __name__ == '__main__':
     from calibre.ebooks.metadata.book.base import Metadata
     mi = Metadata('Test book', authors=('Kovid Goyal',))

src/calibre/ebooks/pdb/ereader/inspector.py

@@ -140,5 +140,6 @@ def main(args=sys.argv):
 
     return 0
 
+
 if __name__ == '__main__':
     sys.exit(main())

src/calibre/ebooks/pdf/render/test.py

@@ -134,7 +134,6 @@ def main():
     print('PDF written to:', pdf)
     print('Image written to:', path)
 
+
 if __name__ == '__main__':
     main()
-
-

src/calibre/ebooks/pml/pmlml.py

@@ -188,7 +188,7 @@ class PMLMLizer(object):
             text = text.replace('\\Q="%s"' % unused, '')
 
         # Remove \Cn tags that are within \x and \Xn tags
-        text = re.sub(unicode(r'(?msu)(?P<t>\\(x|X[0-4]))(?P<a>.*?)(?P<c>\\C[0-4]\s*=\s*"[^"]*")(?P<b>.*?)(?P=t)'), '\g<t>\g<a>\g<b>\g<t>', text)
+        text = re.sub(unicode(r'(?msu)(?P<t>\\(x|X[0-4]))(?P<a>.*?)(?P<c>\\C[0-4]\s*=\s*"[^"]*")(?P<b>.*?)(?P=t)'), '\\g<t>\\g<a>\\g<b>\\g<t>', text)
 
         # Replace bad characters.
         text = text.replace(u'\xc2', '')
@@ -206,7 +206,7 @@ class PMLMLizer(object):
         text = re.sub('[ ]{2,}', ' ', text)
 
         # Condense excessive \c empty line sequences.
-        text = re.sub('(\\c\s*\\c\s*){2,}', '\\c \n\\c\n', text)
+        text = re.sub('(\\c\\s*\\c\\s*){2,}', '\\c \n\\c\n', text)
 
         # Remove excessive newlines.
         text = re.sub('\n[ ]+\n', '\n\n', text)

src/calibre/ebooks/rtf/rtfml.py

@@ -142,7 +142,7 @@ class RTFMLizer(object):
         return text
 
     def remove_tabs(self, text):
-        self.log.debug('\Replace tabs with space for processing...')
+        self.log.debug('Replace tabs with space for processing...')
         text = text.replace('\t', ' ')
 
         return text

src/calibre/ebooks/rtf2xml/check_encoding.py

@@ -32,6 +32,7 @@ class CheckEncoding:
                     return True
         return False
 
+
 if __name__ == '__main__':
     check_encoding_obj = CheckEncoding()
     check_encoding_obj.check_encoding(sys.argv[1])

src/calibre/ebooks/rtf2xml/default_encoding.py

@@ -175,6 +175,7 @@ class DefaultEncoding:
                     elif enc == 'pca':
                         self.__code_page = '850'
 
+
 if __name__ == '__main__':
     import sys
     encode_obj = DefaultEncoding(

src/calibre/ebooks/rtf2xml/field_strings.py

@@ -411,8 +411,6 @@ class FieldStrings:
             line -- the string to be parse
         Retuns:
             The name of the field
-        Logic:
-        self.__link_switch = re.compile(r'\\l\s{1,}(.*?)\s')
         """
         self.__link_switch = re.compile(r'\\l\s{1,}"{0,1}(.*?)"{0,1}\s')
         the_string = name

src/calibre/ebooks/rtf2xml/hex_2_utf8.py

@@ -562,6 +562,8 @@ class Hex2Utf8:
             self.__convert_preamble()
         else:
             self.__convert_body()
+
+
 """
 how to swap case for non-capitals
 my_string.swapcase()

src/calibre/ebooks/rtf2xml/list_table.py

@@ -120,7 +120,7 @@ class ListTable:
         Requires: line -- line to process
         Returns: nothing
         Logic:
-            I have found \list.
+            I have found \\list.
             Change the state to list
             Get the open bracket count so you know when this state ends.
             Append an empty list to all lists.
@@ -162,7 +162,7 @@ class ListTable:
         Requires: line -- line to process
         Returns: nothing
         Logic:
-            I have found \listlevel.
+            I have found \\listlevel.
             Change the state to level
             Get the open bracket count so you know when this state ends.
             Append an empty list to the last list inside all lists.
@@ -285,7 +285,7 @@ class ListTable:
         Returns:
             nothing
         Logic:
-            Method is used for to parse text in the \leveltext group.
+            Method is used for to parse text in the \\leveltext group.
         """
         num = line[18:]
         the_num = int(num, 16)

src/calibre/ebooks/rtf2xml/options_trem.py

@@ -270,6 +270,8 @@ class ParseOptions:
             return options_dict, arguments
         else:
             return 0,0
+
+
 if __name__ == '__main__':
     this_dict = {
         'indents': [0, 'i'],

src/calibre/ebooks/rtf2xml/override_table.py

@@ -52,7 +52,7 @@ class OverrideTable:
         Returns:
             nothing
         Logic:
-            The group {\override has been found.
+            The group {\\override has been found.
             Check for the end of the group.
             Otherwise, add appropriate tokens to the override dictionary.
         """

src/calibre/ebooks/rtf2xml/paragraph_def.py

@@ -128,7 +128,7 @@ if another paragraph_def is found, the state changes to collect_tokens.
         'list-conti'    : 'list-continue',
         'list-hang_'    : 'list-hang',
         # 'list-tebef'    :	'list-text-before',
-        'list-level'    : 'level',
+        # 'list-level'    : 'level',
         'list-id___'    : 'list-id',
         'list-start'    : 'list-start',
         'nest-level'    : 'nest-level',
@@ -198,7 +198,7 @@ if another paragraph_def is found, the state changes to collect_tokens.
         'bor-cel-to'    : 'border-cell-top',
         'bor-cel-le'    : 'border-cell-left',
         'bor-cel-ri'    : 'border-cell-right',
-        'bor-par-bo'    : 'border-paragraph-bottom',
+        # 'bor-par-bo'    : 'border-paragraph-bottom',
         'bor-par-to'    : 'border-paragraph-top',
         'bor-par-le'    : 'border-paragraph-left',
         'bor-par-ri'    : 'border-paragraph-right',
@@ -413,7 +413,7 @@ if another paragraph_def is found, the state changes to collect_tokens.
         Returns:
             nothing
         Logic:
-            I have found a \pard while I am collecting tokens. I want to reset
+            I have found a \\pard while I am collecting tokens. I want to reset
             the dectionary and do nothing else.
         """
         # Change this

src/calibre/ebooks/rtf2xml/process_tokens.py

@@ -584,7 +584,7 @@ class ProcessTokens:
         }
     """
         # unknown
-        # These must get passed on because they occure after \*
+        # These must get passed on because they occure after \\*
         'do'                :   ('un', 'unknown___', self.default_func),
         'company'           :	('un', 'company___', self.default_func),
         'shpinst'           :   ('un', 'unknown___', self.default_func),
@@ -716,10 +716,10 @@ class ProcessTokens:
     def divide_num(self, numerator, denominator):
         try:
             # calibre why ignore negative number? Wrong in case of \fi
-            numerator = float(re.search('[0-9.\-]+', numerator).group())
+            numerator = float(re.search('[0-9.\\-]+', numerator).group())
         except TypeError as msg:
             if self.__run_level > 3:
-                msg = ('No number to process?\nthis indicates that the token \(\\li\) \
+                msg = ('No number to process?\nthis indicates that the token \\(\\li\\) \
                 should have a number and does not\nnumerator is \
                 "%s"\ndenominator is "%s"\n') % (numerator, denominator)
                 raise self.__bug_handler(msg)

src/calibre/ebooks/rtf2xml/sections.py

@@ -27,19 +27,19 @@ class Sections:
     logic
     ---------------
     The tags for the first section breaks have already been written.
-    RTF stores section breaks with the \sect tag. Each time this tag is
+    RTF stores section breaks with the \\sect tag. Each time this tag is
     encountered, add one to the counter.
-    When I encounter the \sectd tag, I want to collect all the appropriate tokens
+    When I encounter the \\sectd tag, I want to collect all the appropriate tokens
-    that describe the section. When I reach a \pard, I know I an stop collecting
+    that describe the section. When I reach a \\pard, I know I an stop collecting
     tokens and write the section tags.
     The exception to this method occurs when sections occur in field blocks, such
     as the index. Normally, two section break occur within the index and other
-    field-blocks. (If less or more section breaks occurr, this code may not work.)
+    field-blocks. (If less or more section breaks occur, this code may not work.)
     I want the sections to occur outside of the index. That is, the index
     should be nested inside one section tag. After the index is complete, a new
     section should begin.
     In order to write the sections outside of the field blocks, I have to store
-    all of the field block as a string. When I ecounter the \sect tag, add one to
+    all of the field block as a string. When I ecounter the \\sect tag, add one to
     the section counter, but store this number in a list. Likewise, store the
     information describing the section in another list.
     When I reach the end of the field block, choose the first item from the
@@ -243,7 +243,7 @@ class Sections:
             nothing
         Logic:
             Text or control words indicating text have been found
-            before \pard. This shoud indicate older RTF. Reset the state
+            before \\pard. This shoud indicate older RTF. Reset the state
             Write the section defintion. Insert a paragraph definition.
             Insert {} to mark the end of a paragraph defintion
         """

src/calibre/ebooks/rtf2xml/styles.py

@@ -121,7 +121,7 @@ class Styles:
         'list-conti'    : 'list-continue',
         'list-hang_'    : 'list-hang',
         # 'list-tebef'    :	'list-text-before',
-        'list-level'    : 'level',
+        # 'list-level'    : 'level',
         'list-id___'    : 'list-id',
         'list-start'    : 'list-start',
         'nest-level'    : 'nest-level',
@@ -192,7 +192,7 @@ class Styles:
         'bor-cel-to'    : 'border-cell-top',
         'bor-cel-le'    : 'border-cell-left',
         'bor-cel-ri'    : 'border-cell-right',
-        'bor-par-bo'    : 'border-paragraph-bottom',
+        # 'bor-par-bo'    : 'border-paragraph-bottom',
         'bor-par-to'    : 'border-paragraph-top',
         'bor-par-le'    : 'border-paragraph-left',
         'bor-par-ri'    : 'border-paragraph-right',

src/calibre/ebooks/snb/snbfile.py

@@ -333,6 +333,7 @@ def main():
         return 1
     return 0
 
+
 if __name__ == "__main__":
     """SNB file unit test"""
     sys.exit(main())

src/calibre/gui2/dbus_export/demo.py

@@ -160,6 +160,7 @@ class MainWindow(QMainWindow):
                 self.window_unblocked.emit()
         return QMainWindow.event(self, ev)
 
+
 app=QApplication([])
 app.setAttribute(Qt.AA_DontUseNativeMenuBar, False)
 app.setApplicationName('com.calibre-ebook.DBusExportDemo')

src/calibre/gui2/dialogs/template_dialog.py

@@ -456,6 +456,7 @@ class TemplateDialog(QDialog, Ui_TemplateDialog):
             self.rule = ('', txt)
         QDialog.accept(self)
 
+
 if __name__ == '__main__':
     app = QApplication([])
     from calibre.ebooks.metadata.book.base import field_metadata

src/calibre/gui2/lrf_renderer/text.py

@@ -581,5 +581,6 @@ class Word(object):
 def main(args=sys.argv):
     return 0
 
+
 if __name__ == '__main__':
     sys.exit(main())

src/calibre/gui2/preferences/behavior.py

@@ -171,8 +171,8 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         info_dialog(self, _('Done'),
                 _('Confirmation dialogs have all been reset'), show=True)
 
+
 if __name__ == '__main__':
     from PyQt5.Qt import QApplication
     app = QApplication([])
     test_widget('Interface', 'Behavior')
-

src/calibre/gui2/store/loader.py

@@ -190,6 +190,7 @@ class Stores(OrderedDict):
         return cls(builtin.gui, builtin.name, config=builtin.config,
                    base_plugin=builtin.base_plugin), ver
 
+
 if __name__ == '__main__':
     st = time.time()
     count = 0
@@ -199,5 +200,3 @@ if __name__ == '__main__':
         print(code.encode('utf-8'))
         print('\n', '_'*80, '\n', sep='')
     print ('Time to download all %d plugins: %.2f seconds'%(count, time.time() - st))
-
-

src/calibre/gui2/store/search/models.py

@@ -153,15 +153,15 @@ class Matches(QAbstractItemModel):
         # Remove filter identifiers
         # Remove the prefix.
         for loc in ('all', 'author', 'author2', 'authors', 'title', 'title2'):
-            query = re.sub(r'%s:"(?P<a>[^\s"]+)"' % loc, '\g<a>', query)
+            query = re.sub(r'%s:"(?P<a>[^\s"]+)"' % loc, r'\g<a>', query)
             query = query.replace('%s:' % loc, '')
         # Remove the prefix and search text.
         for loc in ('cover', 'download', 'downloads', 'drm', 'format', 'formats', 'price', 'store'):
             query = re.sub(r'%s:"[^"]"' % loc, '', query)
             query = re.sub(r'%s:[^\s]*' % loc, '', query)
         # Remove whitespace
-        query = re.sub('\s', '', query)
+        query = re.sub(r'\s', '', query)
-        mod_query = re.sub('\s', '', mod_query)
+        mod_query = re.sub(r'\s', '', mod_query)
         # If mod_query and query are the same then there were no filter modifiers
         # so this isn't a filterable query.
         if mod_query == query:

src/calibre/library/caches.py

@@ -128,6 +128,7 @@ def set_use_primary_find_in_search(toWhat):
     global pref_use_primary_find_in_search
     pref_use_primary_find_in_search = toWhat
 
+
 y, c, n, u = map(icu_lower, (_('yes'), _('checked'), _('no'), _('unchecked')))
 yes_vals = {y, c, 'true'}
 no_vals = {n, u, 'false'}
@@ -1215,5 +1216,3 @@ class SortKeyGenerator(object):
     # }}}
 
 # }}}
-
-

src/calibre/library/catalogs/bibtex.py

@@ -241,7 +241,7 @@ class BIBTEX(CatalogPlugin):
             # define a function to replace the template entry by its value
             def tpl_replace(objtplname) :
 
-                tpl_field = re.sub(u'[\{\}]', u'', objtplname.group())
+                tpl_field = re.sub(u'[\\{\\}]', u'', objtplname.group())
 
                 if tpl_field in TEMPLATE_ALLOWED_FIELDS :
                     if tpl_field in ['pubdate', 'timestamp'] :
@@ -258,14 +258,14 @@ class BIBTEX(CatalogPlugin):
 
             if len(template_citation) >0 :
                 tpl_citation = bibtexclass.utf8ToBibtex(
-                    bibtexclass.ValidateCitationKey(re.sub(u'\{[^{}]*\}',
+                    bibtexclass.ValidateCitationKey(re.sub(u'\\{[^{}]*\\}',
                         tpl_replace, template_citation)))
 
                 if len(tpl_citation) >0 :
                     return tpl_citation
 
             if len(entry["isbn"]) > 0 :
-                template_citation = u'%s' % re.sub(u'[\D]',u'', entry["isbn"])
+                template_citation = u'%s' % re.sub(u'[\\D]',u'', entry["isbn"])
 
             else :
                 template_citation = u'%s' % str(entry["id"])

src/calibre/library/catalogs/csv_xml.py

@@ -154,9 +154,9 @@ class CSV_XML(CatalogPlugin):
 
                     # Convert HTML to markdown text
                     if type(item) is unicode:
-                        opening_tag = re.search('<(\w+)(\x20|>)', item)
+                        opening_tag = re.search('<(\\w+)(\x20|>)', item)
                         if opening_tag:
-                            closing_tag = re.search('<\/%s>$' % opening_tag.group(1), item)
+                            closing_tag = re.search('<\\/%s>$' % opening_tag.group(1), item)
                             if closing_tag:
                                 item = html2text(item)
 

src/calibre/library/catalogs/epub_mobi.py

@@ -61,7 +61,7 @@ class EPUB_MOBI(CatalogPlugin):
                            "Default: '%default'\n"
                            "Applies to: AZW3, EPUB, MOBI output formats")),
                    Option('--exclude-genre',
-                          default='\[.+\]|^\+$',
+                          default='\\[.+\\]|^\\+$',
                           dest='exclude_genre',
                           action=None,
                           help=_("Regex describing tags to exclude as genres.\n"

src/calibre/library/catalogs/epub_mobi_builder.py

@@ -1209,11 +1209,11 @@ class CatalogBuilder(object):
               clipped to max_len
             """
 
-            normalized = massaged = re.sub('\s', '', ascii_text(tag).lower())
+            normalized = massaged = re.sub('\\s', '', ascii_text(tag).lower())
-            if re.search('\W', normalized):
+            if re.search('\\W', normalized):
                 normalized = ''
                 for c in massaged:
-                    if re.search('\W', c):
+                    if re.search('\\W', c):
                         normalized += self.generate_unicode_name(c)
                     else:
                         normalized += c
@@ -1376,7 +1376,7 @@ class CatalogBuilder(object):
         Return:
          (str): asciized version of author
         """
-        return re.sub("\W", "", ascii_text(author))
+        return re.sub("\\W", "", ascii_text(author))
 
     def generate_format_args(self, book):
         """ Generate the format args for template substitution.
@@ -4209,9 +4209,9 @@ class CatalogBuilder(object):
 
         # Generate a legal XHTML id/href string
         if self.letter_or_symbol(series) == self.SYMBOLS:
-            return "symbol_%s_series" % re.sub('\W', '', series).lower()
+            return "symbol_%s_series" % re.sub('\\W', '', series).lower()
         else:
-            return "%s_series" % re.sub('\W', '', ascii_text(series)).lower()
+            return "%s_series" % re.sub('\\W', '', ascii_text(series)).lower()
 
     def generate_short_description(self, description, dest=None):
         """ Generate a truncated version of the supplied string.
@@ -4292,7 +4292,7 @@ class CatalogBuilder(object):
                 else:
                     if re.match('[0-9]+', word[0]):
                         word = word.replace(',', '')
-                        suffix = re.search('[\D]', word)
+                        suffix = re.search('[\\D]', word)
                         if suffix:
                             word = '%10.0f%s' % (float(word[:suffix.start()]), word[suffix.start():])
                         else:
@@ -4308,7 +4308,7 @@ class CatalogBuilder(object):
             else:
                 if re.search('[0-9]+', word[0]):
                     word = word.replace(',', '')
-                    suffix = re.search('[\D]', word)
+                    suffix = re.search('[\\D]', word)
                     if suffix:
                         word = '%10.0f%s' % (float(word[:suffix.start()]), word[suffix.start():])
                     else:
@@ -4638,7 +4638,7 @@ class CatalogBuilder(object):
         # confusion with decimal points.
 
         # Explode lost CRs to \n\n
-        for lost_cr in re.finditer('([a-z])([\.\?!])([A-Z])', comments):
+        for lost_cr in re.finditer('([a-z])([\\.\\?!])([A-Z])', comments):
             comments = comments.replace(lost_cr.group(),
                                         '%s%s\n\n%s' % (lost_cr.group(1),
                                                         lost_cr.group(2),

src/calibre/library/catalogs/utils.py

@@ -90,8 +90,8 @@ class NumberToText(object):  # {{{
         # Special case ordinals
         if re.search('[st|nd|rd|th]',self.number):
             self.number = re.sub(',','',self.number)
-            ordinal_suffix = re.search('[\D]', self.number)
+            ordinal_suffix = re.search('[\\D]', self.number)
-            ordinal_number = re.sub('\D','',re.sub(',','',self.number))
+            ordinal_number = re.sub('\\D','',re.sub(',','',self.number))
             if self.verbose:
                 self.log("Ordinal: %s" % ordinal_number)
             self.number_as_float = ordinal_number
@@ -120,7 +120,7 @@ class NumberToText(object):  # {{{
             self.text = NumberToText(self.number.replace('%',' percent')).text
 
         # Test for decimal
-        elif re.search('\.',self.number):
+        elif re.search('\\.',self.number):
             if self.verbose:
                 self.log("Decimal: %s" % self.number)
             self.number_as_float = self.number
@@ -151,12 +151,12 @@ class NumberToText(object):  # {{{
             self.text = NumberToText(self.number_as_float).text
 
         # Test for hybrid e.g., 'K2, 2nd, 10@10'
-        elif re.search('[\D]+', self.number):
+        elif re.search('[\\D]+', self.number):
             if self.verbose:
                 self.log("Hybrid: %s" % self.number)
             # Split the token into number/text
-            number_position = re.search('\d',self.number).start()
+            number_position = re.search('\\d',self.number).start()
-            text_position = re.search('\D',self.number).start()
+            text_position = re.search('\\D',self.number).start()
             if number_position < text_position:
                 number = self.number[:text_position]
                 text = self.number[text_position:]
@@ -225,4 +225,3 @@ class NumberToText(object):  # {{{
                     self.log(u'resultString: %s' % resultString)
                 self.text = resultString.strip().capitalize()
 # }}}
-

src/calibre/library/comments.py

@@ -16,7 +16,7 @@ from calibre.utils.html2text import html2text
 
 # Hackish - ignoring sentences ending or beginning in numbers to avoid
 # confusion with decimal points.
-lost_cr_pat = re.compile('([a-z])([\.\?!])([A-Z])')
+lost_cr_pat = re.compile('([a-z])([\\.\\?!])([A-Z])')
 lost_cr_exception_pat = re.compile(r'(Ph\.D)|(D\.Phil)|((Dr|Mr|Mrs|Ms)\.[A-Z])')
 sanitize_pat = re.compile(r'<script|<table|<tr|<td|<th|<style|<iframe',
         re.IGNORECASE)

src/calibre/library/custom_columns.py

@@ -657,7 +657,7 @@ class CustomColumns(object):
             editable=True, display={}):
         if not label:
             raise ValueError(_('No label was provided'))
-        if re.match('^\w*$', label) is None or not label[0].isalpha() or label.lower() != label:
+        if re.match('^\\w*$', label) is None or not label[0].isalpha() or label.lower() != label:
             raise ValueError(_('The label must contain only lower case letters, digits and underscores, and start with a letter'))
         if datatype not in self.CUSTOM_DATA_TYPES:
             raise ValueError('%r is not a supported data type'%datatype)
@@ -809,5 +809,3 @@ class CustomColumns(object):
         self.conn.executescript(script)
         self.conn.commit()
         return num
-
-

src/calibre/library/database.py

@@ -50,7 +50,7 @@ def _connect(path):
     conn =  sqlite.connect(path, factory=Connection, detect_types=sqlite.PARSE_DECLTYPES|sqlite.PARSE_COLNAMES)
     conn.row_factory = lambda cursor, row : list(row)
     conn.create_aggregate('concat', 1, Concatenate)
-    title_pat = re.compile('^(A|The|An)\s+', re.IGNORECASE)
+    title_pat = re.compile('^(A|The|An)\\s+', re.IGNORECASE)
 
     def title_sort(title):
         match = title_pat.search(title)
@@ -1514,6 +1514,7 @@ def text_to_tokens(text):
             continue
     return ans, OR
 
+
 if __name__ == '__main__':
     sqlite.enable_callback_tracebacks(True)
     db = LibraryDatabase('/home/kovid/temp/library1.db.orig')

src/calibre/library/sqlite.py

@@ -68,6 +68,7 @@ def _py_convert_timestamp(val):
         return parse_date(val, as_utc=False)
     return None
 
+
 convert_timestamp = _py_convert_timestamp if _c_speedup is None else \
                     _c_convert_timestamp
 
@@ -75,6 +76,7 @@ convert_timestamp = _py_convert_timestamp if _c_speedup is None else \
 def adapt_datetime(dt):
     return isoformat(dt, sep=' ')
 
+
 sqlite.register_adapter(datetime, adapt_datetime)
 sqlite.register_converter('timestamp', convert_timestamp)
 
@@ -82,6 +84,7 @@ sqlite.register_converter('timestamp', convert_timestamp)
 def convert_bool(val):
     return val != '0'
 
+
 sqlite.register_adapter(bool, lambda x : 1 if x else 0)
 sqlite.register_converter('bool', convert_bool)
 sqlite.register_converter('BOOL', convert_bool)
@@ -411,4 +414,3 @@ def test():
     c = sqlite.connect(':memory:')
     if load_c_extensions(c, True):
         print('Loaded C extension successfully')
-

src/calibre/libunzip.py

@@ -64,6 +64,7 @@ def extract_member(filename, match=re.compile(r'\.(jpg|jpeg|gif|png)\s*$', re.I)
         if match.search(name):
             return name, zf.read(name)
 
+
 comic_exts = {'png', 'jpg', 'jpeg', 'gif', 'webp'}
 
 

src/calibre/srv/pre_activated.py

@@ -14,6 +14,8 @@ from calibre.constants import islinux
 
 def pre_activated_socket():
     return None
+
+
 has_preactivated_support = False
 
 if islinux:

src/calibre/translations/__init__.py

@@ -73,7 +73,7 @@ def check_for_critical_bugs():
         print('WARNING: Translation errors detected')
         print('See the .errors directory and http://translate.sourceforge.net/wiki/toolkit/using_pofilter')
 
+
 if __name__ == '__main__':
     import sys
     import_from_launchpad(sys.argv[1])
-

src/calibre/translations/msgfmt.py

@@ -146,7 +146,7 @@ def make(filename, outfile):
         # This is a message with plural forms
         elif l.startswith('msgid_plural'):
             if section != ID:
-                print('msgid_plural not preceeded by msgid on %s:%d' %\
+                print('msgid_plural not preceeded by msgid on %s:%d' %
                     (infile, lno), file=sys.stderr)
                 sys.exit(1)
             l = l[12:]
@@ -157,7 +157,7 @@ def make(filename, outfile):
             section = STR
             if l.startswith('msgstr['):
                 if not is_plural:
-                    print('plural without msgid_plural on %s:%d' %\
+                    print('plural without msgid_plural on %s:%d' %
                         (infile, lno), file=sys.stderr)
                     sys.exit(1)
                 l = l.split(']', 1)[1]
@@ -165,7 +165,7 @@ def make(filename, outfile):
                     msgstr += '\0'  # Separator of the various plural forms
             else:
                 if is_plural:
-                    print('indexed msgstr required for plural on  %s:%d' %\
+                    print('indexed msgstr required for plural on  %s:%d' %
                         (infile, lno), file=sys.stderr)
                     sys.exit(1)
                 l = l[6:]
@@ -180,7 +180,7 @@ def make(filename, outfile):
         elif section == STR:
             msgstr += l
         else:
-            print('Syntax error on %s:%d' % (infile, lno), \
+            print('Syntax error on %s:%d' % (infile, lno),
                   'before:', file=sys.stderr)
             print(l, file=sys.stderr)
             sys.exit(1)

src/calibre/utils/Zeroconf.py

@@ -1627,6 +1627,7 @@ class Zeroconf(object):
 # Test a few module features, including service registration, service
 # query (for Zoe), and service unregistration.
 
+
 if __name__ == '__main__':
     print("Multicast DNS Service Discovery for Python, version", __version__)
     r = Zeroconf()

src/calibre/utils/cleantext.py

@@ -49,6 +49,7 @@ def allowed(x):
 def py_clean_xml_chars(unicode_string):
     return u''.join(filter(allowed, unicode_string))
 
+
 clean_xml_chars = native_clean_xml_chars or py_clean_xml_chars
 
 
@@ -85,5 +86,4 @@ def unescape(text, rm=False, rchar=u''):
         if rm:
             return rchar  # replace by char
         return text  # leave as is
-    return re.sub("&#?\w+;", fixup, text)
+    return re.sub("&#?\\w+;", fixup, text)
-

src/calibre/utils/fonts/free_type.py

@@ -30,6 +30,7 @@ def same_thread(func):
         return func(self, *args, **kwargs)
     return check_thread
 
+
 FreeTypeError = getattr(plugins['freetype'][0], 'FreeTypeError', Exception)
 
 
@@ -80,5 +81,3 @@ class FreeType(object):
     @same_thread
     def load_font(self, data):
         return Face(self.ft.load_font(data))
-
-

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

@@ -113,6 +113,7 @@ class FontMetrics(object):
         'The width of the string at the specified pixel size and stretch, in pixels'
         return sum(self.advance_widths(string, pixel_size, stretch))
 
+
 if __name__ == '__main__':
     import sys
     from calibre.utils.fonts.sfnt.container import Sfnt
@@ -127,4 +128,3 @@ if __name__ == '__main__':
     print('AvgWidth:', m.pdf_avg_width)
     print('ItalicAngle', m.post.italic_angle)
     print('StemV', m.pdf_stemv)
-

src/calibre/utils/formatter_functions.py

@@ -640,7 +640,7 @@ class BuiltinReGroup(BuiltinFormatterFunction):
             'the template and the eval functions, you use [[ for { and ]] for }.'
             ' The following example in template program mode looks for series '
             'with more than one word and uppercases the first word: '
-            "{series:'re_group($, \"(\S* )(.*)\", \"[[$:uppercase()]]\", \"[[$]]\")'}")
+            "{series:'re_group($, \"(\\S* )(.*)\", \"[[$:uppercase()]]\", \"[[$]]\")'}")
 
     def evaluate(self, formatter, kwargs, mi, locals, val, pattern, *args):
         from formatter import EvalFormatter
@@ -924,9 +924,9 @@ class BuiltinSublist(BuiltinFormatterFunction):
             'of zero is assumed to be the length of the list. Examples using '
             'basic template mode and assuming that the tags column (which is '
             'comma-separated) contains "A, B, C": '
-            '{tags:sublist(0,1,\,)} returns "A". '
+            '{tags:sublist(0,1,\\,)} returns "A". '
-            '{tags:sublist(-1,0,\,)} returns "C". '
+            '{tags:sublist(-1,0,\\,)} returns "C". '
-            '{tags:sublist(0,-1,\,)} returns "A, B".'
+            '{tags:sublist(0,-1,\\,)} returns "A, B".'
             )
 
     def evaluate(self, formatter, kwargs, mi, locals, val, start_index, end_index, sep):

src/calibre/utils/inotify.py

@@ -26,6 +26,7 @@ class DirTooLarge(ValueError):
     def __init__(self, bdir):
         ValueError.__init__(self, 'The directory {0} is too large to monitor. Try increasing the value in /proc/sys/fs/inotify/max_user_watches'.format(bdir))
 
+
 _inotify = None
 
 
@@ -320,6 +321,7 @@ class INotifyTreeWatcher(INotify):
         self.modified = set()
         return ret
 
+
 if __name__ == '__main__':
     w = INotifyTreeWatcher(sys.argv[-1])
     w()

src/calibre/utils/ipc/server.py

@@ -87,6 +87,7 @@ class ConnectedWorker(Thread):
 class CriticalError(Exception):
     pass
 
+
 _name_counter = itertools.count()
 
 if islinux:
@@ -384,4 +385,3 @@ class Server(Thread):
 
     def __exit__(self, *args):
         self.close()
-

src/calibre/utils/sftp.py

@@ -85,5 +85,6 @@ def main(args=sys.argv):
     f.close()
     return 0
 
+
 if __name__ == '__main__':
     sys.exit(main())

src/calibre/utils/threadpool.py

@@ -292,7 +292,7 @@ if __name__ == '__main__':
 
     # this will be called when an exception occurs within a thread
     def handle_exception(request, exc_info):
-        print("Exception occured in request #%s: %s" % \
+        print("Exception occured in request #%s: %s" %
           (request.requestID, exc_info[1]))
 
     # assemble the arguments for each job to a list...

src/calibre/utils/titlecase.py

@@ -15,7 +15,7 @@ from calibre.utils.icu import capitalize, upper
 __all__ = ['titlecase']
 __version__ = '0.5'
 
-SMALL = 'a|an|and|as|at|but|by|en|for|if|in|of|on|or|the|to|v\.?|via|vs\.?'
+SMALL = 'a|an|and|as|at|but|by|en|for|if|in|of|on|or|the|to|v\\.?|via|vs\\.?'
 PUNCT = r"""!"#$%&'‘’()*+,\-‒–—―./:;?@[\\\]_`{|}~"""
 
 SMALL_WORDS = re.compile(r'^(%s)$' % SMALL, re.I)
@@ -54,7 +54,7 @@ def titlecase(text):
 
     all_caps = upper(text) == text
 
-    words = re.split('\s+', text)
+    words = re.split('\\s+', text)
     line = []
     for word in words:
         if all_caps:

src/calibre/web/fetch/simple.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python2
-from __future__ import with_statement
+from __future__ import with_statement, print_function
-from __future__ import print_function
 __license__   = 'GPL v3'
 __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
 
@@ -110,7 +109,7 @@ def default_is_link_wanted(url, tag):
 
 class RecursiveFetcher(object):
     LINK_FILTER = tuple(re.compile(i, re.IGNORECASE) for i in
-                ('.exe\s*$', '.mp3\s*$', '.ogg\s*$', '^\s*mailto:', '^\s*$'))
+                ('.exe\\s*$', '.mp3\\s*$', '.ogg\\s*$', '^\\s*mailto:', '^\\s*$'))
     # ADBLOCK_FILTER = tuple(re.compile(i, re.IGNORECASE) for it in
     #                       (
     #