我有这个json，我试图在python的列表列表中提取第一个元素/列表...如何提取ads_list中的第一个项目？
我可以使用任何内置函数来提取json文件中的第一项吗？除了简单地像数组一样遍历整个数组之外，我还需要其他东西。
P.S。我缩短了json数据
这是列表。
{
u'data':{
u'ad_list':[
{
u'data':{
u'require_feedback_score':0,
u'hidden_by_opening_hours':False,
u'trusted_required':False,
u'currency':u'EGP',
u'require_identification':False,
u'is_local_office':False,
u'first_time_limit_btc':None,
u'city':u'',
u'location_string':u'Egypt',
u'countrycode':u'EG',
u'max_amount':u'20000',
u'lon':0.0,
u'sms_verification_required':False,
u'require_trade_volume':0.0,
u'online_provider':u'SPECIFIC_BANK',
u'max_amount_available':u'20000',
u'msg': u" \u2605\u2605\u2605\u2605\u2605 \u0645\u0631\u062d\u0628\u0627 \u2605\u2605\u2605\u2605\u2605\r\n\r\n\u0625\u0630\u0627 \u0643\u0646\u062a \u062a\u0631\u063a\u0628 \u0641\u064a \u0628\u064a\u0639 \u0627\u0648 \u0634\u0631\u0627\u0621 \u0627\u0644\u0628\u062a\u0643\u0648\u064a\u0646 \u062a\u0648\u0627\u0635\u0644 \u0645\u0639\u064a \u0648\u0633\u0623\u0642\u0648\u0645 \u0628\u062e\u062f\u0645\u062a\u0643\r\n\u0644\u0644\u062a\u0648\u0627\u0635\u0644: https: //tawk.to/hanyibrahim\r\n \u0627\u0644\u062e\u064a\u0627\u0631 \u0644\u0644\u062a\u062d\u0648\u064a\u0644: \u0627\u0644\u0628\u0646\u0643 \u0627\u0644\u062a\u062c\u0627\u0631\u064a \u0627\u0644\u062f\u0648\u0644\u064a \u0627\u0648\u0641\u0648\u062f\u0627\u0641\u0648\u0646 \u0643\u0627\u0634 \u0627\u0648 \u0627\u062a\u0635\u0627\u0644\u0627\u062a \u0641\u0644\u0648\u0633 \u0627\u0648 \u0627\u0648\u0631\u0627\u0646\u062c \u0645\u0648\u0646\u064a\r\n\r\n'' \u0634\u0643\u0631\u0627 ''\r\n\r\n\r\n \u2605\u2605\u2605\u2605\u2605 Hello \u2605\u2605\u2605\u2605\u2605\r\n\r\nIf you would like to trade Bitcoins please let me know and I will help you\r\nconnect: https: //tawk.to/hanyibrahim\r\nOption transfer:Bank CIB Or Vodafone Cash Or Etisalat Flous Or Orange Money\r\n'' Thank ''",
u'volume_coefficient_btc':u'1.50',
u'profile':{
u'username':u'hanyibrahim11',
u'feedback_score':100,
u'trade_count':u'3000+',
u'name':u'hanyibrahim11 (3000+; 100%)',
u'last_online': u'2019-01-14T17:54:52+00:00 '}, u' bank_name':u'CIB_Vodafone Cash_Etisalat Flous_Orange Money',
u'trade_type':u'ONLINE_BUY',
u'ad_id':803036,
u'temp_price':u'67079.44',
u'payment_window_minutes':90,
u'min_amount':u'50',
u'limit_to_fiat_amounts':u'',
u'require_trusted_by_advertiser':False,
u'temp_price_usd':u'3738.54',
u'lat':0.0,
u'visible':True,
u'created_at': u'2018-07-25T08:12:21+00:00 ', u' atm_model':None,
u'is_low_risk':True
},
u'actions':{
u'public_view': u'https://localbitcoins.com/ad/803036'
}
},
{
u'data':{
u'require_feedback_score':0,
u'hidden_by_opening_hours':False,
u'trusted_required':False,
u'currency':u'EGP',
u'require_identification':False,
u'is_local_office':False,
u'first_time_limit_btc':None,
u'city':u'',
u'location_string':u'Egypt',
u'countrycode':u'EG',
u'max_amount':u'20000',
u'lon':0.0,
u'sms_verification_required':False,
u'require_trade_volume':0.0,
u'online_provider':u'CASH_DEPOSIT',
u'max_amount_available':u'20000',
u'msg':u'QNB,
CIB deposite- Vodafone Cash - Etisalat Felous - Orange Money - Western Union - Money Gram \r\n- Please do not entiate a new trade request if you are not serious to finalize it.',
u'volume_coefficient_btc':u'1.50',
u'profile':{
u'username':u'Haboush',
u'feedback_score':99,
u'trade_count':u'500+',
u'name':u'Haboush (500+; 99%)',
u'last_online': u'2019-01-14T16:48:52+00:00 '}, u' bank_name':u'QNB\u2714CIB\u2714Vodafone\u2714Orange\u2714Etisalat\u2714WU',
u'trade_type':u'ONLINE_BUY',
u'ad_id':719807,
u'temp_price':u'66860.18',
u'payment_window_minutes':270,
u'min_amount':u'100',
u'limit_to_fiat_amounts':u'',
u'require_trusted_by_advertiser':False,
u'temp_price_usd':u'3726.32',
u'lat':0.0,
u'visible':True,
u'created_at': u'2018-03-24T19:29:08+00:00 ', u' atm_model':None,
u'is_low_risk':True
},
u'actions':{
u'public_view': u'https://localbitcoins.com/ad/719807'
}
},
}
],
u'ad_count':17
}
}
答案 0 :(得分：1)
假设您的数据结构存储在变量j中，则可以使用j['data']['ad_list'][0]从ad_list键中提取第一项。如果try-except可以为空，请使用IndexError块捕获可能的ad_list异常。