diff --git a/scrapy/core/spidermw.py b/scrapy/core/spidermw.py
index 87d08cab7..35264a92b 100644
--- a/scrapy/core/spidermw.py
+++ b/scrapy/core/spidermw.py
@@ -19,7 +19,7 @@ def _isiterable(possible_iterator):
 
 
 def _fname(f):
-    return "%s.%s".format(
+    return "{}.{}".format(
         f.__self__.__class__.__name__,
         f.__func__.__name__
     )
diff --git a/scrapy/utils/console.py b/scrapy/utils/console.py
index c7a2ace88..133261fd7 100644
--- a/scrapy/utils/console.py
+++ b/scrapy/utils/console.py
@@ -28,6 +28,7 @@ def _embed_ipython_shell(namespace={}, banner=''):
 def _embed_bpython_shell(namespace={}, banner=''):
     """Start a bpython shell"""
     import bpython
+
     @wraps(_embed_bpython_shell)
     def wrapper(namespace=namespace, banner=''):
         bpython.embed(locals_=namespace, banner=banner)
@@ -37,6 +38,7 @@ def _embed_bpython_shell(namespace={}, banner=''):
 def _embed_ptpython_shell(namespace={}, banner=''):
     """Start a ptpython shell"""
     import ptpython.repl
+
     @wraps(_embed_ptpython_shell)
     def wrapper(namespace=namespace, banner=''):
         print(banner)
diff --git a/scrapy/utils/python.py b/scrapy/utils/python.py
index 3d02d9478..9c1f3c2fe 100644
--- a/scrapy/utils/python.py
+++ b/scrapy/utils/python.py
@@ -152,6 +152,7 @@ def memoizemethod_noargs(method):
     weak reference to its object
     """
     cache = weakref.WeakKeyDictionary()
+
     @wraps(method)
     def new_method(self, *args, **kwargs):
         if self not in cache: