完整代码

def detect(img):
    requests.adapters.DEFAULT_RETRIES = 5  # 增加重连次数
    s = requests.session()
    s.keep_alive = False  # 关闭多余连接

    request_url = "https://aip.baidubce.com/rest/2.0/image-classify/v2/dish"
    params = {"image":img,"top_num":1}
    access_token = 'mytoken'
    request_url = request_url + "?access_token=" + access_token
    headers = {'content-type': 'application/x-www-form-urlencoded'}

    response = s.post(request_url, data=params, headers=headers)
    time.sleep(5)
    name = response.json()['result'][0]['name']
    response.close()
    s.close()
    return name