如何从作为字符串的字典中的字典中访问值

Question

我一直在为计算机科学 30 门课程做作业。在这个作业中，我被要求访问一个 API 并返回一个特定的值，而不仅仅是整个字典。我的问题是我似乎无法打印我想要的值，因为它是一个字符串而不是整数或切片。如果您决定向我提供帮助，这是我为您提供的完整代码。感谢您的宝贵时间。

import requests
import urllib.parse

# set up a temporary copy of the google api
temp = "https://maps.googleapis.com/maps/api/directions/json?
origin=Disneyland&destination=Universal+Studios+Hollywood4"

# set up the main API and the origin and destination inputs from the user
main_api = "https://maps.googleapis.com/maps/api/directions/json?"
origin = str(input("Enter in the place that is you are going away from: "))
destination = str(input("Enter the destination that you would like to reach: 
"))

# set up the url from the main api, the origin, and the destination
url = main_api + urllib.parse.urlencode({"origin": origin, "destination": 
destination})
# print the url back to the user
print(url)

# show the user the distance between the origin and the destination
json_data = requests.get(url).json()
print(json_data['routes']['legs']['distance']['text'])

Answer 1

您有几个嵌套在 json dict 响应中的列表。看看下面的结果！

json_data['routes'][0]['legs'][0]['distance']

输出

{'text': '1,153 mi', 'value': 1855409}