import requests
import json

def get_access_token():
    """
    使用 API Key，Secret Key 获取access_token，替换下列示例中的应用API Key、应用Secret Key
    """
        
    url = "https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=[应用API Key]&client_secret=[应用Secret Key]"
    
    payload = json.dumps("")
    headers = {
        'Content-Type': 'application/json',
        'Accept': 'application/json'
    }
    response = requests.request("POST", url, headers=headers, data=payload)
    return response.json().get("access_token")

def main():
        
    url = "https://aip.baidubce.com/rpc/2.0/ai_custom/v1/wenxinworkshop/reranker/bce_reranker_base?access_token=" + get_access_token()
    
    payload = json.dumps({
        "query": "上海天气",
        "documents":["上海气候", "北京美食"]
    })
    headers = {
        'Content-Type': 'application/json'
    }
    
    response = requests.request("POST", url, headers=headers, data=payload)
    
    print(response.text)
    

if __name__ == '__main__':
    main()