签名示例（Python）

import hashlib
from copy import deepcopy


def md5_sign(org_params, secret_key):
    params = deepcopy(org_parms)
    if "sign" in params:
        params.pop("sign")

    lists = []

    for item in params:
        lists.append(item)
    lists.sort()

    tmp = []
    for key in lists:
        value = params[key]
        if isinstance(value, bytes):
            value = value.decode("utf-8")

        if isinstance(key, bytes):
            key = key.decode("utf-8")

        tmp.append("=".join([key, str(value)]))

    if isinstance(secret_key, bytes):
        secret_key = secret_key.decode("utf-8")

    tmp.append("=".join(['secret_key', secret_key]))

    param_str = "&".join(tmp)
    if not isinstance(param_str, bytes):
        param_str = param_str.encode('utf-8')
    return hashlib.md5(param_str).hexdigest()


def check_sign(param, secret_key):
    data = deepcopy(param)
    if "sign" in data:
        org_sign = data.pop('sign')
    else:
        return False
    
    if not org_sign:
        return False
    if sign_type != 'MD5':
        return False
    nsg = md5_sign(data, secret_key)
    print(nsg)
    return org_sign == nsg


if __name__ == '__main__':
    params = {"sing": "1", "method": "2", "id": "1231", "key": "apdfa", "sort": "serr"}
    print(md5_sign(params, 'SECRET'))