bittrex APISIGN_NOT_PROVIDED

Question

此身份验证出现错误一切顺利，但没有获得签名，则hmac或foward出现问题

import urllib
import requests
import json
import time
import hashlib
import hmac


nonce = str('{:10.0f}'.format(time.time()))
apikey = 'KEY HERE'
apisecret = 'SECRET HERE'
url = 'https://api.bittrex.com/api/v1.1/account/getbalances?apikey=apikey'
url += '&nonce=' + str(int(time.time()))
sign = hmac.new(b'apisecret', b'url', hashlib.sha512).hexdigest()
headers = {'&secret': sign}

request = requests.get(url, sign)
balance = json.loads(urllib.urlopen(url).read())

print(balance)

应该打印帐户余额