获取TypeError:“函数”对象不可订阅此错误在API创建过程中发生

Question

def operator_logincheck_web(request, email=None):

    data = json.loads
    email = data['email']
    email = email.lower()
    password = data['password']
    if Operator.objects.filter(email = email).count() > 0:
        if Operator.objects.filter(email = email, password = password).count() > 0:
            loginobj = Operator.objects.get(email = email, password = password)
            send_data = {'status':"1", 'msg':"Login Successfull", 'user_id':str(loginobj.id)}
        else:
            send_data = {'status':"0", 'msg':"Incorrect Password"}
    else:
        send_data = {'status':"0", 'msg':"Incorrect Email"}
            
    return JsonResponse(send_data)

但是在操作员登录检查web中的终端文件“/home/sumit/Cricket/CricketApp/views.py”第1443行中获取此错误 电子邮件=数据['email'] TypeError:“函数”对象不可下标

Answer 1

嗯，json.loads是一个函数，您已经将它赋回变量调用data，并且您正在从中查找email属性。您可以通过以下方式从request对象中查找有效负载：

data: dict = request.data

---

从错误中吸取教训

Python程序中的每个数据都由对象或对象之间的关系表示

这就是Pythondocumentation对对象的描述

Objects are Python’s abstraction for data. All data in a Python program is represented by objects or by relations between objects. (In a sense, and in conformance to Von Neumann’s model of a “stored program computer”, code is also represented by objects.)

Python的函数是一流的对象。这意味着，（参考：Dan Bader）

You can assign them to variables, store them in data structures, pass them as arguments to other functions, and even return them as values from other functions.

Python支持高阶函数。这意味着，（参考：Wikipedia）

A higher-order function is a function that does at least one of the following, takes one or more functions as arguments (i.e. procedural parameters) or returns a function as its result.

>>> import json
>>> string_json = '{"key": "value"}'
>>> json.loads(string_json)
{'key': 'value'}
>>> 
>>> data = json.loads
>>> type(data)
function
>>> 
>>> data(string_json)
{'key': 'value'}

如果你不在这里发表评论，我希望你能理解这里发生了什么。您可以从Primer on Python Decorators文章中了解到许多与上述概念相关的内容

参考资料：-

• Python’s Functions Are First-Class
• Higher-order function
• Objects, values and types
• What are "first class" objects?