如何用python生成hmac-sha1的oauth签名？

import hmac
import hashlib
import base64

def generate_oauth_signature(key, message):
    key = key.encode('utf-8')
    message = message.encode('utf-8')
    signature = hmac.new(key, message, hashlib.sha1)
    encoded_signature = base64.b64encode(signature.digest()).decode('utf-8')
    return encoded_signature

key = "your_key"
message = "your_message"
signature = generate_oauth_signature(key, message)
print(signature)