如何在python中读取slack api中的文件？

import requests

# Slack API相关信息
token = 'YOUR_SLACK_API_TOKEN'
file_id = 'YOUR_FILE_ID'

# Slack API请求URL
url = f'https://slack.com/api/files.info?token={token}&file={file_id}'

# 发起GET请求获取文件信息
response = requests.get(url)
data = response.json()

# 检查API响应是否成功
if response.status_code == 200 and data['ok']:
    # 获取文件下载链接
    download_url = data['file']['url_private_download']
    
    # 发起GET请求下载文件
    file_response = requests.get(download_url, headers={'Authorization': f'Bearer {token}'})
    
    # 检查文件下载是否成功
    if file_response.status_code == 200:
        # 保存文件到本地
        with open('downloaded_file.txt', 'wb') as file:
            file.write(file_response.content)
        print('文件下载成功！')
    else:
        print('文件下载失败！')
else:
    print('获取文件信息失败！')