python接口請求 JSON parse error: Unrecognized token 'type': was expecting 'null'

報錯的原因：傳參不正確，協議頭信息的Content-Type字段定義了請求格式，傳json數據請求頭爲：Content-Type：application/json
可以先查看參數的類型：print(type(data))
data1 = json.dumps(data)#類型轉換
r = requests.post(url=url, headers=headers, data=data1)
res = requests.post(url=url, params=params, json=data, headers=headers)