遍历Python字典中的键值对来构建对象列表 [英] Iterating through key value pairs in a python dictionary to build an list of objects

问题描述

在这种情况下，只有1个对象，但我怎样才能遍历json变量来构建我需要的dics列表？

解决方案

我正在寻找一种方法来使代码容错多一点，能够处理单个和多个对象

简单的方法是检查进入的数据类型并更改它转换成其余代码可以使用的标准格式。如果你得到 dict ，只要创建一个 list 来存放 dict

  json = request.get_json（force = True）＃接收邮递员的请求j $ j 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 $ {'a'：j ['key1']，'token'：j ['key2']} for j in json] 
  

I need to post some objects to a flask app where, with each object made of 2 key-value pairs.

I'm using postman to test sending 1 object as json, but I need the ability to send multiple objects ( again each of which are made of 2 kv pairs as in screenshot )

My flask app looks like:

json = request.get_json(force=True) # receives request from postman
for j in json:
        print str(j)

test = [{'a': j['key1'], 'token':j['key2']} for j in json ]

I would like rebuild the json into a list ('test') of dictionaries with dic containing 2 kv pairs (i.e. each dic is an object).

Unfortunately I realized that because json above is

{u'key2': u'xyz', u'key1': u'abc'}

I'm getting:

TypeError: string indices must be integers

please see TypeError: string indices must be integers with flask json

In this case there is only 1 object, but How can I iterate through the json variable to build the list of dics I need?

解决方案

I was just looking for a way to make the code a little more fault tolerant and able to handle both single and multiple objects

The easy way to do that is to check the type of data coming in and change it into a standardized form that the rest of your code can consume. If you get a dict just create a list to hold the dict and the rest of the code will work.

json = request.get_json(force=True) # receives request from postman
for j in json:
        print str(j)

if isinstance(json, dict):
    json = [json]
test = [{'a': j['key1'], 'token':j['key2']} for j in json ]

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