':param account: å®¢æèŽŠå·ççšæ·å
:param avatar: å€Žåæä»¶ïŒå¿é¡»æ¯ jpg æ ŒåŒ
:return: è¿åç JSON æ°æ®å'

def upload_custom_service_account_avatar(self, account, avatar):

    return self.post(url='http://api.weixin.qq.com/customservice/kfaccount/uploadheadimg', params={'access_token': self.token, 'kf_account': account}, files={'media': avatar})
