Fixed LGTM errors and warnings

platypush/backend/http/__init__.py

@@ -6,8 +6,9 @@ from multiprocessing import Process
 
 try:
     from websockets.exceptions import ConnectionClosed
+    from websockets import serve as websocket_serve
 except ImportError:
-    from websockets import ConnectionClosed
+    from websockets import ConnectionClosed, serve as websocket_serve
 
 from platypush.backend import Backend
 from platypush.backend.http.app import application
@@ -354,7 +355,6 @@ class HttpBackend(Backend):
 
     def websocket(self):
         """ Websocket main server """
-        import websockets
         set_thread_name('WebsocketServer')
 
         async def register_websocket(websocket, path):
@@ -378,7 +378,7 @@ class HttpBackend(Backend):
 
         self._websocket_loop = get_or_create_event_loop()
         self._websocket_loop.run_until_complete(
-            websockets.serve(register_websocket, self.bind_address, self.websocket_port,
+            websocket_serve(register_websocket, self.bind_address, self.websocket_port,
                              **websocket_args))
         self._websocket_loop.run_forever()
 

platypush/backend/websocket/__init__.py

@@ -1,4 +1,10 @@
 from platypush.backend import Backend
+try:
+    from websockets.exceptions import ConnectionClosed
+    from websockets import serve as websocket_serve
+except ImportError:
+    from websockets import ConnectionClosed, serve as websocket_serve
+
 from platypush.context import get_plugin, get_or_create_event_loop
 from platypush.message import Message
 from platypush.message.request import Request
@@ -73,10 +79,6 @@ class WebsocketBackend(Backend):
 
     def notify_web_clients(self, event):
         """ Notify all the connected web clients (over websocket) of a new event """
-        try:
-            from websockets.exceptions import ConnectionClosed
-        except ImportError:
-            from websockets import ConnectionClosed
 
         async def send_event(websocket):
             try:
@@ -96,12 +98,6 @@ class WebsocketBackend(Backend):
 
     def run(self):
         import asyncio
-        import websockets
-
-        try:
-            from websockets.exceptions import ConnectionClosed
-        except ImportError:
-            from websockets import ConnectionClosed
 
         super().run()
         self.register_service(port=self.port, name='ws')
@@ -152,8 +148,7 @@ class WebsocketBackend(Backend):
             websocket_args['ssl'] = self.ssl_context
 
         self._loop = get_or_create_event_loop()
-        server = websockets.serve(serve_client, self.bind_address, self.port,
-                                  **websocket_args)
+        server = websocket_serve(serve_client, self.bind_address, self.port, **websocket_args)
 
         self._loop.run_until_complete(server)
         self._loop.run_forever()

platypush/message/event/chat/slack.py

@@ -26,7 +26,7 @@ class SlackEvent(Event, ABCMeta):
         return datetime.fromtimestamp(timestamp, tz=gettz())   # lgtm [py/call-to-non-callable]
 
 
-class SlackMessageEvent(SlackEvent, ABCMeta):
+class SlackMessageEvent(SlackEvent, ABCMeta):  # lgtm [py/conflicting-attributes]
     """
     Base class for message-related events.
     """

platypush/plugins/__init__.py

@@ -39,7 +39,7 @@ def action(f):
     return _execute_action
 
 
-class Plugin(EventGenerator, ExtensionWithManifest):
+class Plugin(EventGenerator, ExtensionWithManifest):   # lgtm [py/missing-call-to-init]
     """ Base plugin class """
 
     def __init__(self, **kwargs):

platypush/plugins/websocket/__init__.py

@@ -1,10 +1,10 @@
 import json
-import websockets
 
 try:
     from websockets.exceptions import ConnectionClosed
+    from websockets import connect as websocket_connect
 except ImportError:
-    from websockets import ConnectionClosed
+    from websockets import ConnectionClosed, connect as websocket_connect
 
 from platypush.context import get_or_create_event_loop
 from platypush.message import Message
@@ -52,7 +52,7 @@ class WebsocketPlugin(Plugin):
                                                                ssl_cafile=ssl_cafile,
                                                                ssl_capath=ssl_capath)
 
-            async with websockets.connect(url, **websocket_args) as websocket:
+            async with websocket_connect(url, **websocket_args) as websocket:
                 try:
                     await websocket.send(str(msg))
                 except ConnectionClosed as err:

platypush/user/__init__.py

@@ -5,12 +5,12 @@ import time
 from typing import Optional, Dict
 
 import bcrypt
-import jwt
 
 try:
     from jwt.exceptions import PyJWTError
+    from jwt import encode as jwt_encode, decode as jwt_decode
 except ImportError:
-    from jwt import PyJWTError
+    from jwt import PyJWTError, encode as jwt_encode, decode as jwt_decode
 
 from sqlalchemy import Column, Integer, String, DateTime, ForeignKey
 from sqlalchemy.orm import sessionmaker, scoped_session
@@ -204,7 +204,7 @@ class UserManager:
             'expires_at': expires_at.timestamp() if expires_at else None,
         }
 
-        token = jwt.encode(payload, priv_key, algorithm='RS256')
+        token = jwt_encode(payload, priv_key, algorithm='RS256')
         if isinstance(token, bytes):
             token = token.decode()
         return token
@@ -230,7 +230,7 @@ class UserManager:
         pub_key, priv_key = get_or_generate_jwt_rsa_key_pair()
 
         try:
-            payload = jwt.decode(token.encode(), pub_key, algorithms=['RS256'])
+            payload = jwt_decode(token.encode(), pub_key, algorithms=['RS256'])
         except PyJWTError as e:
             raise InvalidJWTTokenException(str(e))