如何修复'AttributeError：'dict'对象没有属性...'Python断言中的错误

Question

我正在使用请求模块和python assert关键字设置请求断言，但是

AttributeError：'dict'对象没有属性'documentation_url'

当我尝试在json响应中声明字符串时。我如何在json响应中声明某些内容，当条件为true时，它应该打印出某些内容？

import requests
import pprint

URL = 'https://github.com/timeline.json'

def get_github_json(URL):
    response = requests.get(URL).json()
    return response

assert get_github_json(URL).documentation_url == 'https://developer.github.com/v3/activity/events/#list-public-events'

json响应如下所示：

{'documentation_url': 'https://developer.github.com/v3/activity/events/#list-public-events',
 'message': 'Hello there, wayfaring stranger. If you’re reading this then you '
            'probably didn’t see our blog post a couple of years back '
            'announcing that this API would go away: http://git.io/17AROg Fear '
            'not, you should be able to get what you need from the shiny new '
            'Events API instead.'
}

Answer 1

嗨，因为它是字典，所以您必须使用键来获取值。

我们知道这response是一个字典，因此在这种情况下，当您想要来自的值时documentation_url，我们需要这样做：

    def get_github_json(url):
        response = requests.get(url).json()
        return response

    assert get_github_json(url)['documentation_url'] # <---- your are getting the value by giving the key

如果尝试打印出来response['documentation_url']，则会得到以下结果： https://developer.github.com/v3/activity/events/#list-public-events