diff --git a/recipes/nature.recipe b/recipes/nature.recipe
index e7f50bdd70..d21b8e092d 100644
--- a/recipes/nature.recipe
+++ b/recipes/nature.recipe
@@ -51,7 +51,7 @@ class Nature(BasicNewsRecipe):
             'img', attrs={'data-test': check_words('issue-cover-image')}
         )['src']
         try:
-            self.cover_url = self.cover_url.replace("w200","w500") # enlarge cover size resolution
+            self.cover_url = self.cover_url.replace("w200","w500")  # enlarge cover size resolution
         except:
             """
             failed, img src might have changed, use default width 200
diff --git a/recipes/new_yorker.recipe b/recipes/new_yorker.recipe
index 7197dd1c61..cd5d6057c9 100644
--- a/recipes/new_yorker.recipe
+++ b/recipes/new_yorker.recipe
@@ -82,9 +82,9 @@ class NewYorker(BasicNewsRecipe):
                     cover_url_width_index = self.cover_url.find("w_")
                     old_width = self.cover_url[cover_url_width_index:cover_url_width_index+5]
                     self.cover_url = self.cover_url.replace(old_width, "w_560")
-                except Exception as e:
+                except Exception:
                     self.log('Failed enlarging cover img, using the original one')
-              
+
                 self.log('Found cover:', self.cover_url)
         stories = defaultdict(list)
         last_section = 'Unknown'
diff --git a/src/calibre/ebooks/rtf2xml/check_encoding.py b/src/calibre/ebooks/rtf2xml/check_encoding.py
index 4f8a04ceda..c98a4cfce3 100644
--- a/src/calibre/ebooks/rtf2xml/check_encoding.py
+++ b/src/calibre/ebooks/rtf2xml/check_encoding.py
@@ -5,6 +5,7 @@ import sys
 
 from polyglot.builtins import unicode_type
 
+
 class CheckEncoding:
 
     def __init__(self, bug_handler):