我有json数据，我只想选择一些项目我怎么能在python中做到这一点？答案

【问题标题】：I have json data and i want to select some items only how can i do it in python?我有json数据，我只想选择一些项目我怎么能在python中做到这一点？
【发布时间】：2015-01-26 11:37:02
【问题描述】：

   {
       "data": [
            {
                "category": "Organization", 
                "name": "GITM IEEE", 
                "category_list": [
                    {
                        "id": "198503866828628", 
                        "name": "Organization"
                    }
                ], 
                "access_token": "x", 
                "perms": [
                    "EDIT_PROFILE", 
                    "CREATE_CONTENT", 
                    "MODERATE_CONTENT", 
                    "CREATE_ADS", 
                    "BASIC_ADMIN"
                ], 
                "id": "474676675993584"
            }, 
            {
                "category": "Event planning/event services", 
                "name": "Ignitron 2014", 
                "category_list": [
                    {
                        "id": "192119584190796", 
                        "name": "Event"
                    }
                ], 
                "access_token": "x", 
                "perms": [
                    "ADMINISTER", 
                    "EDIT_PROFILE", 
                    "CREATE_CONTENT", 
                    "MODERATE_CONTENT", 
                    "CREATE_ADS", 
                    "BASIC_ADMIN"
                ], 
                "id": "731808386867764"
            }, 
            {
                "access_token": "x", 
                "category": "Community organization", 
                "perms": [
                    "ADMINISTER", 
                    "EDIT_PROFILE", 
                    "CREATE_CONTENT", 
                    "MODERATE_CONTENT", 
                    "CREATE_ADS", 
                    "BASIC_ADMIN"
                ], 
                "name": "GITM Model United Nations (GITM MUN)", 
                "id": "232082683584902"
            }, 
            {
                "access_token": "x", 
                "category": "Computers/technology", 
                "perms": [
                    "ADMINISTER", 
                    "EDIT_PROFILE", 
                    "CREATE_CONTENT", 
                    "MODERATE_CONTENT", 
                    "CREATE_ADS", 
                    "BASIC_ADMIN"
                ], 
                "name": "Bros!s", 
                "id": "332832946796051"
            }, 
            {
                "access_token": "x", 
                "category": "Musician/band", 
                "perms": [
                    "ADMINISTER", 
                    "EDIT_PROFILE", 
                    "CREATE_CONTENT", 
                    "MODERATE_CONTENT", 
                    "CREATE_ADS", 
                    "BASIC_ADMIN"
                ], 
                "name": "6 Strings", 
                "id": "267855836697950"
            }, 
            {
                "access_token": "x", 
                "category": "Sports team", 
                "perms": [
                    "ADMINISTER", 
                    "EDIT_PROFILE", 
                    "CREATE_CONTENT", 
                    "MODERATE_CONTENT", 
                    "CREATE_ADS", 
                    "BASIC_ADMIN"
                ], 
                "name": "Counter Strike::74th Cavalry", 
                "id": "486465148068957"
            }, 
            {
                "access_token": "x", 
                "category": "Entertainer", 
                "perms": [
                    "ADMINISTER", 
                    "EDIT_PROFILE", 
                    "CREATE_CONTENT", 
                    "MODERATE_CONTENT", 
                    "CREATE_ADS", 
                    "BASIC_ADMIN"
                ], 
                "name": "Bakchod's of Hostel.", 
                "id": "356188731080152"
            }
        ]
    }

这是数据，我想选择页面的名称如何在 python 中完成？

【问题讨论】：

我相信 python 有一个内置的“json”模块。您可以使用它来检索值。链接到 json 文档 => docs.python.org/2/library/json.html
“页面名称”？第几页？预期的输出是多少？是GITM IEEE吗？是Ignitron 2014吗？是列表['GITM IEEE', 'Ignitron 2014', ...]吗？

标签： python json parsing

【解决方案1】：

这段代码应该可以完成工作：

import json

json_file = open('your_json_file_path')
json_dict = json.load(json_file)

site_names = []

for page in json_dict.get('data', []):
    if page.get('name'):
        site_names.append(page['name'])

print site_names

输出：

[u'GITM IEEE', u'Ignitron 2014', u'GITM Model United Nations (GITM MUN)', u'Bros
!s', u'6 Strings', u'Counter Strike::74th Cavalry', u"Bakchod's of Hostel."]

【讨论】：

【解决方案2】：

遍历json_data["data"] 中的字典列表并使用密钥访问您需要的任何内容。

print([dic["name"] for dic in json_data["data"]])
['GITM IEEE', 'Ignitron 2014', 'GITM Model United Nations (GITM MUN)', 'Bros!s', '6 Strings', 'Counter Strike::74th Cavalry', "Bakchod's of Hostel."]

如果有可能name 不在每个字典中，请使用in 进行检查：

print([dic["name"] for dic in d["data"] if "name" in dic])

【讨论】：

非常感谢您解决了我的问题。