diff --git a/src/calibre/gui2/store/stores/empik_plugin.py b/src/calibre/gui2/store/stores/empik_plugin.py
index b6a2ff11fb..35c3c2995c 100644
--- a/src/calibre/gui2/store/stores/empik_plugin.py
+++ b/src/calibre/gui2/store/stores/empik_plugin.py
@@ -1,13 +1,12 @@
 # -*- coding: utf-8 -*-
 from __future__ import absolute_import, division, print_function, unicode_literals
 
-store_version = 9 # Needed for dynamic plugin loading
+store_version = 9  # Needed for dynamic plugin loading
 
 __license__ = 'GPL 3'
 __copyright__ = '2011-2019, Tomasz Długosz <tomek3d@gmail.com>'
 __docformat__ = 'restructuredtext en'
 
-import re
 from base64 import b64encode
 from contextlib import closing
 try:
@@ -78,7 +77,7 @@ class EmpikStore(BasicStoreConfig, StorePlugin):
                 title = ''.join(data.xpath('.//div[@class="name"]/a/@title'))
                 price = ''.join(data.xpath('.//div[@class="price ta-price-tile "]/text()'))
 
-                #with closing(br.open('https://empik.com' + id.strip(), timeout=timeout/4)) as nf:
+                # with closing(br.open('https://empik.com' + id.strip(), timeout=timeout/4)) as nf:
                 #    idata = html.fromstring(nf.read())
                 #    crawled = idata.xpath('.//a[(@class="chosen hrefstyle") or (@class="connectionsLink hrefstyle")]/text()')
                 #    formats = ','.join([re.sub('ebook, ','', x.strip()) for x in crawled if 'ebook' in x])
@@ -91,6 +90,6 @@ class EmpikStore(BasicStoreConfig, StorePlugin):
                 s.author = author.strip()
                 s.price = price.strip()
                 s.detail_item = 'https://empik.com' + id.strip()
-                #s.formats = formats.upper().strip()
+                # s.formats = formats.upper().strip()
 
                 yield s
diff --git a/src/calibre/gui2/store/stores/legimi_plugin.py b/src/calibre/gui2/store/stores/legimi_plugin.py
index 4c8cfcba0f..0183190e4d 100644
--- a/src/calibre/gui2/store/stores/legimi_plugin.py
+++ b/src/calibre/gui2/store/stores/legimi_plugin.py
@@ -1,13 +1,12 @@
 # -*- coding: utf-8 -*-
 from __future__ import absolute_import, division, print_function, unicode_literals
 
-store_version = 10 # Needed for dynamic plugin loading
+store_version = 10  # Needed for dynamic plugin loading
 
 __license__ = 'GPL 3'
 __copyright__ = '2011-2019, Tomasz Długosz <tomek3d@gmail.com>'
 __docformat__ = 'restructuredtext en'
 
-import re
 from base64 import b64encode
 from contextlib import closing
 try:
diff --git a/src/calibre/gui2/store/stores/litres_plugin.py b/src/calibre/gui2/store/stores/litres_plugin.py
index fc5b943e47..150473b049 100644
--- a/src/calibre/gui2/store/stores/litres_plugin.py
+++ b/src/calibre/gui2/store/stores/litres_plugin.py
@@ -112,7 +112,7 @@ def format_price_in_RUR(price):
     '''
     if price and re.match(r"^\d*?\.\d*?$", price):
         try:
-            price = u'{:,.2F} \u20BD'.format(float(price)) # \u20BD => руб.
+            price = u'{:,.2F} \u20BD'.format(float(price))  # \u20BD => руб.
             price = price.replace(',', ' ').replace('.', ',', 1)
         except:
             pass
diff --git a/src/calibre/gui2/store/stores/virtualo_plugin.py b/src/calibre/gui2/store/stores/virtualo_plugin.py
index 4445fb6d5d..974292b0ef 100644
--- a/src/calibre/gui2/store/stores/virtualo_plugin.py
+++ b/src/calibre/gui2/store/stores/virtualo_plugin.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 from __future__ import absolute_import, division, print_function, unicode_literals
 
-store_version = 10 # Needed for dynamic plugin loading
+store_version = 10  # Needed for dynamic plugin loading
 
 __license__ = 'GPL 3'
 __copyright__ = '2011-2019, Tomasz Długosz <tomek3d@gmail.com>'