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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def sendMessage(self,chat_id,text,parse_mode=None,disable_web=None,reply_msg_id=None,markup=None):
		''' On failure returns False
		On success returns Message Object '''
		payload={'chat_id' : chat_id, 'text' : text, 'parse_mode': parse_mode , 'disable_web_page_preview' : disable_web , 'reply_to_message_id' : reply_msg_id}
		
		if(markup):
			payload['reply_markup']=json.dumps(markup)
			
		response_str = self._command('sendMessage',payload,method='post')
		
		return _validate_response_msg(response_str)