python 取出字典的key排序之后md5

import hashlib
'''608c84ebf44e15529de48c91851d092c'''
dic ={'pt':'1',
      't':'1609917119',
      'imei':'359250054212459',
      'phone':'15757876283',
      'appid':'0',
      'op':'login',
      'pwd':'2224533334',
      'uid':'0',
      'ver':'2.0.4'}
ls = sorted(dic)
s = ''
for key in ls :
    s+=dic[key]
s+='!xz9hr#@ZCVF3gv'
m=hashlib.md5(s.encode('utf8'))
sign = m.hexdigest()
print(sign)