python - 在 api 调用后无法返回我的值 - 获取 TypeError: 'dict' object is not callable

Question

我正在尝试从 api 获取值并使用 api 调用返回它。当我尝试调用 api 函数时，我面临 TypeError: 'dict' object is not callable。我的代码如下

import json
import requests
import datetime
import sys

from flask import Flask, request, jsonify


app = Flask(__name__)
port = '5000'

data = {
      "d": {
        "results": [{
          "timeAccount": "031799ce7bc344a2bb65e7f05cb08c49",
          "balance": "10.1388824",
          "timeAccountType": "SA_AL_DLY",
          "userId": "01000",
          "accountClosed": "false",
          "timeUnit": "DAYS"
        }, {
          "timeAccount": "bc4fb4d44c3e413d8137a59d121c74b6",
          "balance": "25.347206",
          "timeAccountType": "SA_AL_DLY",
          "userId": "01000",
          "accountClosed": "false",
          "timeUnit": "DAYS"
        }, {
          "timeAccount": "f12279ea0d34471581aff90ad71d3f83",
          "balance": "5.6249964",
          "timeAccountType": "SA_AL_DLY",
          "userId": "01000",
          "accountClosed": "false",
          "timeUnit": "DAYS"
        }]
      }
    }


@app.route('/leave_balance')
def leave_balance():
    Balance = 0.0
    for res in data['d']["results"]:
        Balance = Balance + float(res("balance"))

    return jsonify(  
        {
        "conversation": {
            "memory": {
              "balance1" : Balance
             }
         }
        })


if __name__ == '__main__':
    app.run(port=port)

我使用另一个 api 获取的 json 数据，我已在代码中添加为数据。当我作为正常程序单独执行休假余额功能时，它可以正常执行。但是当我作为 API 调用时，我遇到了这个错误

Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
[2020-03-25 09:32:02,490] ERROR in app: Exception on /leave_balance [GET] 
Traceback (most recent call last):
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python37\lib\site-packages\flask\app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python37\lib\site-packages\flask\app.py", line 1951, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python37\lib\site-packages\flask\app.py", line 1820, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python37\lib\site-packages\flask\_compat.py", line 39, in reraise
    raise value
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python37\lib\site-packages\flask\app.py", line 1949, in full_dispatch_request
    rv = self.dispatch_request()
  File "C:\Users\Dell\AppData\Local\Programs\Python\Python37\lib\site-packages\flask\app.py", line 1935, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "c:\Users\Dell\Desktop\CAI-SF\datetime.py", line 101, in leave_balance
    Balance = Balance + float(res("balance"))
TypeError: 'dict' object is not callable
127.0.0.1 - - [25/Mar/2020 09:32:02] "GET /leave_balance HTTP/1.1" 500 -

请在这件事上给予我帮助

标签： pythonjsonapiobjectflask

Answer 1

正如@Iain Shelvington 评论中提到的，您必须在 python 字典上使用方括号，但这很容易出错，另一种方法是使用如果这样的键不存在.get()则不会引发的方法。KeyError

例如，您的代码我将更改为：

import json
import requests
import datetime
import sys

from flask import Flask, request, jsonify


app = Flask(__name__)
port = '5003'

data = {
      "d": {
        "results": [{
          "timeAccount": "031799ce7bc344a2bb65e7f05cb08c49",
          "balance": "10.1388824",
          "timeAccountType": "SA_AL_DLY",
          "userId": "01000",
          "accountClosed": "false",
          "timeUnit": "DAYS"
        }, {
          "timeAccount": "bc4fb4d44c3e413d8137a59d121c74b6",
          "balance": "25.347206",
          "timeAccountType": "SA_AL_DLY",
          "userId": "01000",
          "accountClosed": "false",
          "timeUnit": "DAYS"
        }, {
          "timeAccount": "f12279ea0d34471581aff90ad71d3f83",
          "balance": "5.6249964",
          "timeAccountType": "SA_AL_DLY",
          "userId": "01000",
          "accountClosed": "false",
          "timeUnit": "DAYS"
        }]
      }
    }


@app.route('/leave_balance')
def leave_balance():
    Balance = 0.0
    for res in data['d']["results"]:
        b = res.get('balance', 0.0)
        Balance += float(b)

    return jsonify(  
        {
        "conversation": {
            "memory": {
              "balance1" : Balance
             }
         }
        })


if __name__ == '__main__':
    app.run(port=port)

注意我是如何改变的：

Balance = Balance + float(res("balance"))

至：

b = res.get('balance', 0.0)
Balance += float(b)

因此，在我的示例中发生的情况是，首先，我尝试get像这样从您的字典中获取“平衡” b = res.get('balance', 0.0)，如果它不存在，那么我分配 a0.0并且不会KeyError给出。

然后我将任何b内容转换为float并+=添加新的平衡Balance，从而产生 UI：