small fix for game related parts

* bot.py fix copy paste error in url
* callbackquery.py make data field optional
* message.py introduce optional game field

telegram/bot.py

@@ -776,7 +776,7 @@ class Bot(TelegramObject):
             :class:`telegram.TelegramError`
 
         """
-        url = '{0}/sendMessage'.format(self.base_url)
+        url = '{0}/sendGame'.format(self.base_url)
 
         data = {'chat_id': chat_id, 'game_short_name': game_short_name}
 

telegram/callbackquery.py

@@ -25,14 +25,14 @@ from telegram import TelegramObject, Message, User
 class CallbackQuery(TelegramObject):
     """This object represents a Telegram CallbackQuery."""
 
-    def __init__(self, id, from_user, data, chat_instance, bot=None, **kwargs):
+    def __init__(self, id, from_user, chat_instance, bot=None, **kwargs):
         # Required
         self.id = id
         self.from_user = from_user
-        self.data = data
         self.chat_instance = chat_instance
         # Optionals
         self.message = kwargs.get('message')
+        self.data = kwargs.get('data', '')
         self.inline_message_id = kwargs.get('inline_message_id', '')
         self.game_short_name = kwargs.get('game_short_name')
 

telegram/message.py

@@ -123,6 +123,7 @@ class Message(TelegramObject):
         self.text = kwargs.get('text', '')
         self.entities = kwargs.get('entities', list())
         self.audio = kwargs.get('audio')
+        self.game = kwargs.get('game')
         self.document = kwargs.get('document')
         self.photo = kwargs.get('photo')
         self.sticker = kwargs.get('sticker')