如果对象名是动态的，如何使用Python获取Salesforce对象的元数据？

import requests

# Salesforce登录信息
username = 'your_username'
password = 'your_password'
security_token = 'your_security_token'
client_id = 'your_client_id'
client_secret = 'your_client_secret'

# 获取Access Token
url = 'https://login.salesforce.com/services/oauth2/token'
data = {
    'grant_type': 'password',
    'client_id': client_id,
    'client_secret': client_secret,
    'username': username,
    'password': password + security_token
}
response = requests.post(url, data=data)
access_token = response.json()['access_token']

# 获取对象元数据
object_name = 'your_object_name'
url = f'https://your_salesforce_instance/services/data/v52.0/sobjects/{object_name}/describe'
headers = {
    'Authorization': f'Bearer {access_token}',
    'Content-Type': 'application/json'
}
response = requests.get(url, headers=headers)
metadata = response.json()

# 打印对象元数据
print(metadata)