diff --git a/environments/python/server.py b/environments/python/server.py
index 1dfd48f3..a553dd60 100644
--- a/environments/python/server.py
+++ b/environments/python/server.py
@@ -8,8 +8,9 @@ import bjoern
 from gevent.pywsgi import WSGIServer
 from flask import Flask, request, abort, g
 
+
 class FuncApp(Flask):
-    def __init__(self, name, loglevel = logging.DEBUG):
+    def __init__(self, name, loglevel=logging.DEBUG):
         super(FuncApp, self).__init__(name)
 
         # init the class members
@@ -24,7 +25,8 @@ class FuncApp(Flask):
         #
         self.root.setLevel(loglevel)
         self.ch.setLevel(loglevel)
-        self.ch.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
+        self.ch.setFormatter(logging.Formatter(
+            '%(asctime)s - %(levelname)s - %(message)s'))
         self.logger.addHandler(self.ch)
 
         #
@@ -42,28 +44,30 @@ class FuncApp(Flask):
             body = request.get_json()
             filepath = body['filepath']
             handler = body['functionName']
-        
-            # The value of "functionName" is consist of `<module-name>.<function-name>`.
+
+            # The value of "functionName" is consist of
+            # `<module-name>.<function-name>`.
             moduleName, funcName = handler.split(".")
 
             # check whether the destination is a directory or a file
             if os.path.isdir(filepath):
                 # add package directory path into module search path
                 sys.path.append(filepath)
-                
+
                 # find module from package path we append previously.
-                # Python will try to find module from the same name file under
-                # the package directory. If search is successful, the return 
-                # value is a 3-element tuple; otherwise, an exception "ImportError"
-                # is raised.
-                # Second parameter of find_module enforces python to find same 
-                # name module from the given list of directories to prevent name
-                # confliction with built-in modules.
+                # Python will try to find module from the same name
+                # file under the package directory. If search is
+                # successful, the return value is a 3-element tuple;
+                # otherwise, an exception "ImportError" is raised.
+                # Second parameter of find_module enforces python to
+                # find same name module from the given list of
+                # directories to prevent name confliction with
+                # built-in modules.
                 f, path, desc = imp.find_module(moduleName, [filepath])
-        
+
                 # load module
-                # Return module object is the load is successful; otherwise, 
-                # an exception is raised.
+                # Return module object is the load is successful;
+                # otherwise, an exception is raised.
                 try:
                     mod = imp.load_module(moduleName, f, path, desc)
                 finally:
@@ -72,30 +76,35 @@ class FuncApp(Flask):
             else:
                 # load source from destination python file
                 mod = imp.load_source(moduleName, filepath)
-        
+
             # load user function from module
             self.userfunc = getattr(mod, funcName)
-        
+
             return ""
 
         @self.route('/healthz', methods=['GET'])
         def healthz():
             return "", 200
 
-        @self.route('/', methods=['GET', 'POST', 'PUT', 'HEAD', 'OPTIONS', 'DELETE'])
+        @self.route('/', methods=['GET', 'POST', 'PUT', 'HEAD', 'OPTIONS',
+                                  'DELETE'])
         def f():
-            if self.userfunc == None:
+            if self.userfunc is None:
                 print("Generic container: no requests supported")
                 abort(500)
             #
             # Customizing the request context
             #
-            # If you want to pass something to the function, you can add it to 'g':
+            # If you want to pass something to the function, you can
+            # add it to 'g':
             #   g.myKey = myValue
-            # And the user func can then access that (after doing a "from flask import g").
             #
+            # And the user func can then access that
+            # (after doing a"from flask import g").
+
             return self.userfunc()
 
+
 app = FuncApp(__name__, logging.DEBUG)
 
 #