use ujson as JSON en/decoder if available

telegram/base.py

@@ -18,7 +18,11 @@
 # along with this program.  If not, see [http://www.gnu.org/licenses/].
 """Base class for Telegram Objects."""
 
-import json
+try:
+    import ujson as json
+except ImportError:
+    import json
+
 from abc import ABCMeta
 
 

telegram/utils/request.py

@@ -18,7 +18,10 @@
 # along with this program.  If not, see [http://www.gnu.org/licenses/].
 """This module contains methods to make POST and GET requests"""
 
-import json
+try:
+    import ujson as json
+except ImportError:
+    import json
 import os
 import socket
 import logging

telegram/utils/webhookhandler.py

@@ -3,7 +3,10 @@ import logging
 from telegram import Update
 from future.utils import bytes_to_native_str
 from threading import Lock
-import json
+try:
+    import ujson as json
+except ImportError:
+    import json
 try:
     import BaseHTTPServer
 except ImportError: