Python 字典形式展示的服务器响应头:
>>>r.headers


{

**    'content-encoding': 'gzip',**

**    'transfer-encoding': 'chunked',**

**    'connection': 'close',**

**    'server': 'nginx/1.0.4',**

**    'x-runtime': '148ms',**

**    'etag': '"e1ca502697e5c9317743dc078f67693f"',**

**    'content-type': 'application/json'**
}

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获取请求头字段内容

import requests
    import json
    url = 'https://api.github.com/some/endpoint'
    payload = {'some': 'data'}
    r = requests.post(url, json=payload)
    print(r.headers)#打印请求头
    print(r.headers['Content-Type'])#打印内类型
    print(r.headers.get('Content-Type'))`