JSONから変換されたPythonリストの解析

Question

Googleカスタム検索APIを使用して米国のニュース・アウトレットを検索しようとしています。 Googleが提供するコード例を使用すると、多数の他の辞書やリストを含むPython辞書が完成します。メタ機能の「res」の横に表示されているタグは、各記事でアクセスしようとしている値です。

import os.path 
import csv 
from lxml import html 
from googleapiclient.discovery import build 


def newslist(): 
    ''' 
    Uses google custom search to search 20 US news sources for gun control articles, 
    and converts info into python dictionary. 

    in - none 

    out - res: JSON formatted search results 

    ''' 

    service = build("customsearch", "v1", 
      developerKey="key") 
    res = service.cse().list(
     q='query', 
     cx='searchid', 
    ).execute() 
    return res 


def meta(res, doc_count): 
    ''' 
    Finds necessary meta-data of all articles. Avoids collections, such as those found on Huffington Post and New York Times. 

    in - res: defined above 

    out - meta_csv: csv file with article meta-data 

    ''' 

    row1 = ['doc_id', 'url', 'title', 'publisher', 'date'] 
    if res['context']['items']['pagemap']['metatags']['applicationname'] is not 'collection': 
    for art in res['context']['items']: 
     url = res['context']['items']['link'] 
     title = res['context']['items']['pagemap']['article']['newsarticle']['headline'] 
     publisher = res['context']['items']['displayLink'].split('www.' and '.com') 
     date = res['context']['items']['pagemap']['newsarticle']['datepublished'] 
     row2 = [doc_count, url, title, publisher, date] 
     with open('meta.csv', 'w', encoding = 'utf-8') as meta: 
     csv_file = csv.writer(meta, delimiter = ',', quotechar = '|', 
      quoting = csv.QUOTE_MINIMAL) 
     if doc_count == 1: 
      csv_file.writerow(row1) 
     csv_file.writerow(row2) 
    doc_count += 1 

はここだと検索クエリからの印刷出力の例：私は基本的にループのために書くことができることを理解

{'context': {'title': 'Gun Control articles'}, 
'items': [{'displayLink': 'www.washingtonpost.com', 
    'formattedUrl': 'https://www.washingtonpost.com/.../white-resentment-is-fueling-opposition- ' 
        'to-gun-control-researchers-say/', 
    'htmlFormattedUrl': 'https://www.washingtonpost.com/.../white-resentment-is-fueling-opposition- ' 
         'to-<b>gun</b>-<b>control</b>-researchers-say/', 
    'htmlSnippet': 'Apr 4, 2016 <b>...</b> Racial prejudice could play ' 
        'a significant role in white Americans&#39; ' 
        'opposition to <br>\n' 
        '<b>gun control</b>, according to new research from ' 
        'political scientists at&nbsp;...', 
    'htmlTitle': 'White resentment is fueling opposition to <b>gun ' 
       'control</b>, researchers say', 
    'kind': 'customsearch#result', 
    'link': 'https://www.washingtonpost.com/news/wonk/wp/2016/04/04/white-resentment-is-fueling-opposition-to-gun-control-researchers-say/', 
    'pagemap': {'cse_image': [{'src': 'https://img.washingtonpost.com/rf/image_1484w/2010-2019/WashingtonPost/2015/10/03/Others/Images/2015-10-03/Botsford_gunshow1004_15_10_03_41831443897980.jpg'}], 
       'cse_thumbnail': [{'height': '183', 
            'src': 'https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcSXtMnfm_GHkX3d2dOWgmto3rFjmhzxV8InoPao1tBuiBrEWsDMz4WDKcPB', 
            'width': '275'}], 
       'metatags': [{'apple-itunes-app': 'app-id=938922398, ' 
                'app-argument=https://www.washingtonpost.com/news/wonk/wp/2016/04/04/white-resentment-is-fueling-opposition-to-gun-control-researchers-say/', 
           'article:author': 'https://www.facebook.com/chrisingraham', 
           'article:publisher': 'https://www.facebook.com/washingtonpost', 
           'author': 'https://www.facebook.com/chrisingraham', 
           'fb:admins': '492', 
           'fb:app_id': '41245586762', 
           'news_keywords': 'guns, gun control, ' 
               'racial resentment, ' 
               'white people', 
           'og:description': 'Some white gun owners ' 
               '"understand ' 
               "'freedom' in a very " 
               'particular way."', 
           'og:image': 'https://img.washingtonpost.com/rf/image_1484w/2010-2019/WashingtonPost/2015/10/03/Others/Images/2015-10-03/Botsford_gunshow1004_15_10_03_41831443897980.jpg', 
           'og:site_name': 'Washington Post', 
           'og:title': 'White resentment is fueling ' 
              'opposition to gun control, ' 
              'researchers say', 
           'og:type': 'article', 
           'og:url': 'https://www.washingtonpost.com/news/wonk/wp/2016/04/04/white-resentment-is-fueling-opposition-to-gun-control-researchers-say/', 
           'referrer': 'unsafe-url', 
           'twitter:card': 'summary_large_image', 
           'twitter:creator': '@_cingraham', 
           'viewport': 'width=device-width, ' 
              'initial-scale=1.0, ' 
              'user-scalable=yes, ' 
              'minimum-scale=0.5, ' 
              'maximum-scale=2.0'}], 
       'newsarticle': [{'articlebody': 'People look at ' 
               'handguns during the ' 
               "Nation's Gun Show in " 
               'Chantilly, Va. in ' 
               'October 2015. (Photo ' 
               'by Jabin Botsford/The ' 
               'Washington Post) ' 
               'Racial prejudice ' 
               'could play a ' 
               'significant role in ' 
               'white...', 
           'datepublished': '2016-04-04T11:46-500', 
           'description': 'Some white gun owners ' 
               '"understand ' 
               "'freedom' in a very " 
               'particular way."', 
           'headline': 'White resentment is ' 
              'fueling opposition to ' 
              'gun control, researchers ' 
              'say', 
           'image': 'https://img.washingtonpost.com/rf/image_1484w/2010-2019/WashingtonPost/2015/10/03/Others/Images/2015-10-03/Botsford_gunshow1004_15_10_03_41831443897980.jpg', 
           'mainentityofpage': 'True', 
           'url': 'https://www.washingtonpost.com/news/wonk/wp/2016/04/04/white-resentment-is-fueling-opposition-to-gun-control-researchers-say/'}], 
       'person': [{'name': 'Christopher Ingraham'}]}, 
    'snippet': 'Apr 4, 2016 ... Racial prejudice could play a ' 
       "significant role in white Americans' opposition to \n" 
       'gun control, according to new research from political ' 
       'scientists at\xa0...', 
    'title': 'White resentment is fueling opposition to gun control, ' 
      'researchers say'}, 

が、より簡単に、より少ないコードがある場合、私は思ったんだけどURL、タイトル、パブリッシャー、日付の各値について、このデータにアクセスする集中的な方法です。

Answer 1

jsonモジュールを使用しないのはなぜですか？

import json 
s = ... # Your JSON text 
result = json.loads(s) 

resultあなたのJSONに応じて、dictまたはlistになります。