diff --git a/src/bridge/__init__.py b/src/bridge/__init__.py
index 29e1aa0a..fe0c4b7b 100644
--- a/src/bridge/__init__.py
+++ b/src/bridge/__init__.py
@@ -233,7 +233,7 @@ def appsave(docid):
         WB.log.error('msg="BridgeSave: missing metadata" address="%s" headers="%s" args="%s" error="%s"' %
                      (flask.request.remote_addr, flask.request.headers, flask.request.args, e))
         return wopic.jsonify('Missing metadata, could not save. %s' % RECOVER_MSG), http.client.BAD_REQUEST
-    except ValueError as e:
+    except ValueError:
         WB.log.error('msg="BridgeSave: unknown application" address="%s" appheader="%s" args="%s"' %
                      (flask.request.remote_addr, flask.request.headers.get(BRIDGED_APP_HEADER), flask.request.args))
         # temporary override
diff --git a/src/bridge/codimd.py b/src/bridge/codimd.py
index de32ff33..3b710a8e 100644
--- a/src/bridge/codimd.py
+++ b/src/bridge/codimd.py
@@ -66,8 +66,7 @@ def getredirecturl(viewmode, wopisrc, acctok, docid, filename, displayname):
         return f'{appexturl}/{docid}?{mode}&{urlparse.urlencode(params)}'
 
     # read-only mode: first check if we have a CodiMD redirection
-    res = requests.head(appurl + '/' + docid,
-                        verify=sslverify)
+    res = requests.head(appurl + '/' + docid, verify=sslverify)
     if res.status_code == http.client.FOUND:
         return '%s/s/%s' % (appexturl, urlparse.urlsplit(res.next.url).path.split('/')[-1])
     # we used to redirect to publish mode or normal view to quickly jump in slide mode depending on the content,
@@ -115,7 +114,7 @@ def _unzipattachments(inputbuf):
     return mddoc
 
 
-#def _isslides(doc):
+# def _isslides(doc):
 #    '''Heuristically look for signatures of slides in the header of a md document'''
 #    return doc[:9].decode() == '---\ntitle' or doc[:8].decode() == '---\ntype' or doc[:16].decode() == '---\nslideOptions'
 
diff --git a/src/core/commoniface.py b/src/core/commoniface.py
index 5211950b..0b00995f 100644
--- a/src/core/commoniface.py
+++ b/src/core/commoniface.py
@@ -99,4 +99,3 @@ def validatelock(filepath, appname, oldlock, oldvalue, op, log):
         log.warning('msg="Failed to %s" filepath="%s" appname="%s" reason="%s"' %
                     (op, filepath, appname, e))
         raise
-
diff --git a/src/core/xrootiface.py b/src/core/xrootiface.py
index 4095c166..d0c54cd6 100644
--- a/src/core/xrootiface.py
+++ b/src/core/xrootiface.py
@@ -27,6 +27,7 @@
 homepath = None
 timeout = None
 
+
 def init(inconfig, inlog):
     '''Init module-level variables'''
     global config               # pylint: disable=global-statement