[qa] Fix code lint

Fixes openwisp#20

commitCheck.py

@@ -8,8 +8,8 @@
 commit = sys.argv[2]
 
 # Function converter from php to python
-def mb_substr(s,start,length=None) :
-    return (s[start:(start+length)])
+def mb_substr(s, start, length=None) :
+    return (s[start :(start + length)])
 
 
 # Get Github token
@@ -31,13 +31,11 @@ def mb_substr(s,start,length=None) :
 # Count Api Message when exploded
 api_message_explode_count = len(api_message_explode)
 
-errors=[]
+errors = []
 
 # Check dot in end of the first line
 if api_message_explode[0][
-    len(
-        api_message_explode[0].strip()
-    )-1].strip() == '.' :
+    len(api_message_explode[0].strip()) - 1].strip() == '.' :
         errors.append("Do not add a final dot at the end of the first line.")
 
 # Check prefix
@@ -67,15 +65,15 @@ def mb_substr(s,start,length=None) :
 
 search = requests.get(api + 
     '/search/issues?q=typetype:pr%20sha:' 
-    + mb_substr(commit, 0, 7) + 
+    + mb_substr(commit, 0, 7) +
     '%20is_unmerged%20author:'
-    + api_username + 
+    + api_username +
     '&&sort=updated'
 )
 search_body = search.json()
 
 
-if len(search_body['items']) > 0 :
+if len(search_body['items']) > 0:
     search_data = search_body['items'][0]['number']
     response_url = "/repos/" + str(repo) + "/issues/" + str(search_data) + "/comments"
 
@@ -85,4 +83,4 @@ def mb_substr(s,start,length=None) :
     post_fields = {
         'body': body
     }
-    review = requests.post(api + response_url,json=post_fields, headers=headers)
+    review = requests.post(api + response_url, json=post_fields, headers=headers)