diff --git a/recipes/el_diplo.recipe b/recipes/el_diplo.recipe
index a445412df9..0f1960decf 100644
--- a/recipes/el_diplo.recipe
+++ b/recipes/el_diplo.recipe
@@ -110,7 +110,7 @@ class ElDiplo2023(BasicNewsRecipe):
             p['style'] = f'font-size: {font_size};'
 
         # remove extra text
-        extra_text = soup.find(string="POST TYPE: post")
+        extra_text = soup.find(string='POST TYPE: post')
         if extra_text:
             extra_text.parent.decompose()
 
diff --git a/src/calibre/gui2/actions/column_tooltips.py b/src/calibre/gui2/actions/column_tooltips.py
index d612bb06b4..881be91367 100644
--- a/src/calibre/gui2/actions/column_tooltips.py
+++ b/src/calibre/gui2/actions/column_tooltips.py
@@ -2,7 +2,7 @@
 # License: GPLv3 Copyright: 2022, Charles Haley
 #
 
-from qt.core import Qt, QDialogButtonBox, QVBoxLayout
+from qt.core import QDialogButtonBox, Qt, QVBoxLayout
 
 from calibre.gui2 import error_dialog
 from calibre.gui2.actions import InterfaceAction
@@ -22,7 +22,7 @@ class ToolTipDialog(Dialog):
 
     def __init__(self, title, prefs):
         super().__init__(title, 'show_tooltip_dialog',
-                         prefs = prefs,
+                         prefs=prefs,
                          default_buttons=QDialogButtonBox.StandardButton.Ok)
 
     def setup_ui(self):
diff --git a/src/calibre/gui2/library/models.py b/src/calibre/gui2/library/models.py
index 79fec7bb2f..b5d008ab68 100644
--- a/src/calibre/gui2/library/models.py
+++ b/src/calibre/gui2/library/models.py
@@ -16,9 +16,21 @@ from collections import defaultdict, namedtuple
 from itertools import groupby
 
 from qt.core import (
-    QAbstractTableModel, QApplication, QColor, QDateTime,
-    QFont, QFontMetrics, QIcon, QImage, QLocale, QModelIndex, QPainter,
-    QPixmap, Qt, pyqtSignal)
+    QAbstractTableModel,
+    QApplication,
+    QColor,
+    QDateTime,
+    QFont,
+    QFontMetrics,
+    QIcon,
+    QImage,
+    QLocale,
+    QModelIndex,
+    QPainter,
+    QPixmap,
+    Qt,
+    pyqtSignal,
+)
 
 from calibre import fit_image, human_readable, isbytestring, prepare_string_for_xml, strftime
 from calibre.constants import DEBUG, config_dir, dark_link_color, filesystem_encoding