Question

我收集了Udemy的公开课程数据，并将其全部放在json文件中。每门课程都有一个标识号，在该标识号下存储所有数据。我可以完美地列出我想要的任何细节，除了这些标识号。

我如何自己列出这些数字？感谢。

{
    "153318":
    {
        "lectures data": "31 lectures, 5 hours video",
        "instructor work": "Academy Of Technical Courses, Grow Your Skills Today",
        "title": "Oracle Applications R12 Order Management and Pricing",
        "promotional price": "$19",
        "price": "$20",
        "link": "https://www.udemy.com/oracle-applications-r12-order-management-and-pricing/",
        "instructor": "Parallel Branch Inc"
    },
    "616990":
    {
        "lectures data": "24 lectures, 1.5 hours video",
        "instructor work": "Learning Sans Location",
        "title": "Cloud Computing Development Essentials",
        "promotional price": "$19",
        "price": "$20",
        "link": "https://www.udemy.com/cloud-computing-development-essentials/",
        "instructor": "Destin Learning"
    }
}

Answer 1

你想要那个词典的keys。

import json
with open('course.json') as json_file:
    course=json.load(json_file)

print course.keys()

给予： [u'616990', u'153318']

Answer 2

将json解析为python dict，然后遍历键

parsed = json.loads(input)

for key in parsed.keys():
    print(key)

列出Python字典实例的名称

2 个答案: