pep8

Fixes #1968897 [Edit Metadata: Google identifiers paste as url:](https://bugs.launchpad.net/calibre/+bug/1968897)

src/calibre/devices/kobo/driver.py

@@ -3223,14 +3223,15 @@ class KOBOTOUCH(KOBO):
                     debug_print("KoboTouch:generate_update_from_template  template error - template='%s'" % template)
                     debug_print("KoboTouch:generate_update_from_template - new_value=", new_value)
 
-            debug_print(f"KoboTouch:generate_update_from_template - {book.title} - column_name='{column_name}', current_value='{current_value}', new_value='{new_value}'")
-            if (new_value is not None and \
+            debug_print(
+                f"KoboTouch:generate_update_from_template - {book.title} - column_name='{column_name}',"
+                f" current_value='{current_value}', new_value='{new_value}'")
+            if (new_value is not None and
                             (current_value is None or new_value != current_value)) or \
                         (new_value is None and current_value is not None):
                 update_values.append(new_value)
                 set_clause.append(column_name)
 
-
         plugboard = None
         if self.plugboard_func and not series_only:
             if book.contentID.endswith('.kepub.epub') or not os.path.splitext(book.contentID)[1]:
@@ -3427,7 +3428,6 @@ class KOBOTOUCH(KOBO):
         if show_debug:
             debug_print("KoboTouch:set_core_metadata - end")
 
-
     @classmethod
     def config_widget(cls):
         # TODO: Cleanup the following

src/calibre/devices/kobo/kobotouch_config.py

@@ -693,15 +693,19 @@ class MetadataGroupBox(DeviceOptionsGroupBox):
     @property
     def update_bookstats(self):
         return self.update_bookstats_checkbox.isChecked()
+
     @property
     def bookstats_pagecount_template(self):
         return self.bookstats_pagecount_template_edit.template
+
     @property
     def bookstats_wordcount_template(self):
         return self.bookstats_wordcount_template_edit.template
+
     @property
     def bookstats_timetoread_lower_template(self):
         return self.bookstats_timetoread_lower_template_edit.template
+
     @property
     def bookstats_timetoread_upper_template(self):
         return self.bookstats_timetoread_upper_template_edit.template
@@ -709,6 +713,7 @@ class MetadataGroupBox(DeviceOptionsGroupBox):
 
 from calibre.gui2.dialogs.template_line_editor import TemplateLineEditor
 
+
 class TemplateConfig(QWidget):  # {{{
 
     def __init__(self, val, label=None, tooltip=None):

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

@@ -201,7 +201,7 @@ class GoogleBooks(Source):
     # }}}
 
     def id_from_url(self, url):  # {{{
-        url_pattern = '(?:http|https)://books\.google\.com/books\?id=(?P<id_>.+)'
+        url_pattern = r'(?:http|https)://books\.google\.com/books\?id=(?P<id_>.+)'
         url_pattern = re.compile(url_pattern)
         id_ = url_pattern.search(url).group('id_')
         if id_:

src/calibre/gui2/actions/mark_books.py

@@ -4,7 +4,6 @@
 __license__ = 'GPL v3'
 __copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
 
-from collections import defaultdict
 from functools import partial
 
 from qt.core import (QTimer, QApplication, Qt, QEvent, QDialog, QMenu, QIcon,