Fix PyLint: Consider explicitly re-raising

platformio/remote/ac/base.py

@@ -30,8 +30,8 @@ class AsyncCommandBase(object):
 
         try:
             self.start()
-        except Exception as e:
-            raise pb.Error(str(e))
+        except Exception as exc:
+            raise pb.Error(str(exc)) from exc
 
     @property
     def id(self):

platformio/remote/client/agent_service.py

@@ -164,8 +164,8 @@ class RemoteAgentService(RemoteClientBase):
                 origin_pio_ini,
                 (os.path.getatime(back_pio_ini), os.path.getmtime(back_pio_ini)),
             )
-        except NotPlatformIOProjectError as e:
-            raise pb.Error(str(e))
+        except NotPlatformIOProjectError as exc:
+            raise pb.Error(str(exc)) from exc
 
         cmd_args = ["platformio", "--force", command, "-d", project_dir]
         for env in options.get("environment", []):

platformio/remote/factory/client.py

@@ -38,10 +38,10 @@ class RemoteClientFactory(pb.PBClientFactory, protocol.ReconnectingClientFactory
         auth_token = None
         try:
             auth_token = AccountClient().fetch_authentication_token()
-        except Exception as e:  # pylint:disable=broad-except
+        except Exception as exc:  # pylint:disable=broad-except
             d = defer.Deferred()
             d.addErrback(self.clientAuthorizationFailed)
-            d.errback(pb.Error(e))
+            d.errback(pb.Error(exc))
             return d
 
         d = self.login(