Add weakref to parent for PlexClient (#1355)

Author: JonnyWong16

plexapi/client.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 import time
+import weakref
 from xml.etree import ElementTree
 
 import requests
@@ -62,7 +63,8 @@ class PlexClient(PlexObject):
     key = '/resources'
 
     def __init__(self, server=None, data=None, initpath=None, baseurl=None,
-          identifier=None, token=None, connect=True, session=None, timeout=None):
+          identifier=None, token=None, connect=True, session=None, timeout=None,
+          parent=None):
         super(PlexClient, self).__init__(server, data, initpath)
         self._baseurl = baseurl.strip('/') if baseurl else None
         self._clientIdentifier = identifier
@@ -76,6 +78,7 @@ def __init__(self, server=None, data=None, initpath=None, baseurl=None,
         self._last_call = 0
         self._timeline_cache = []
         self._timeline_cache_timestamp = 0
+        self._parent = weakref.ref(parent) if parent is not None else None
         if not any([data is not None, initpath, baseurl, token]):
             self._baseurl = CONFIG.get('auth.client_baseurl', 'http://localhost:32433')
             self._token = logfilter.add_secret(CONFIG.get('auth.client_token'))