1

当我将正文添加到输出列表时，会输出一些错误的名称。我希望它在两个示例中只输出 nfl subreddit 的名称。功能还是错误？我怎样才能只输出 subreddit nfl 的元组？

文件：

{"author":"403and780","author_flair_css_class":"NHL-EDM4-sheet1-col01-row17","author_flair_text":"EDM - NHL","body":"Don't get why we do this but can't have a Grey Cup GDT.","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsn6","is_submitter":false,"link_id":"t3_7v9yqa","parent_id":"t3_7v9yqa","permalink":"/r/hockey/comments/7v9yqa/game_thread_super_bowl_lii_philadelphia_eagles_vs/dtqrsn6/","retrieved_on":1518931297,"score":2,"stickied":false,"subreddit":"hockey","subreddit_id":"t5_2qiel","subreddit_type":"public"}    
{"author":"kygiacomo","author_flair_css_class":null,"author_flair_text":null,"body":"lol missed the extra wtf","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsn7","is_submitter":false,"link_id":"t3_7vad8n","parent_id":"t3_7vad8n","permalink":"/r/nfl/comments/7vad8n/super_bowl_lii_game_thread_philadelphia_eagles/dtqrsn7/","retrieved_on":1518931297,"score":2,"stickied":false,"subreddit":"nfl","subreddit_id":"t5_2qmg3","subreddit_type":"public"}    
{"author":"shitpostlord4321","author_flair_css_class":null,"author_flair_text":null,"body":"I really hope we get Bleeding Edge before we get the all new all different armor. ","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsn8","is_submitter":false,"link_id":"t3_7v7whz","parent_id":"t3_7v7whz","permalink":"/r/marvelstudios/comments/7v7whz/a_great_new_look_at_iron_mans_avengers_infinity/dtqrsn8/","retrieved_on":1518931297,"score":1,"stickied":false,"subreddit":"marvelstudios","subreddit_id":"t5_2uii8","subreddit_type":"public"}
{"author":"namohysip","author_flair_css_class":null,"author_flair_text":null,"body":"Maybe. I mostly am just doing this to get a story out, and it\u2019s a huge one, so I\u2019m not sure that I\u2019ll be making another fic for many more months. I guess Pokemon Mystery Dungeon just isn\u2019t as popular with the older demographics of AO3.","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsn9","is_submitter":true,"link_id":"t3_7v9psr","parent_id":"t1_dtqrm3t","permalink":"/r/FanFiction/comments/7v9psr/how_do_you_deal_with_bad_reviews/dtqrsn9/","retrieved_on":1518931297,"score":1,"stickied":false,"subreddit":"FanFiction","subreddit_id":"t5_2r5kb","subreddit_type":"public"}
{"author":"SDsc0rch","author_flair_css_class":null,"author_flair_text":null,"body":"if it rates an upvote, I'll click it - I'm not gonna click on low quality      \nnot gonna apologize for it either ","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsna","is_submitter":false,"link_id":"t3_7vaam4","parent_id":"t3_7vaam4","permalink":"/r/The_Donald/comments/7vaam4/daily_reminderif_you_see_any_gray_arrows_on_the/dtqrsna/","retrieved_on":1518931297,"score":4,"stickied":false,"subreddit":"The_Donald","subreddit_id":"t5_38unr","subreddit_type":"public"}
{"author":"scarletcrawford","author_flair_css_class":null,"author_flair_text":null,"body":"Honestly, I wanted Takeshi to stay with Poe, but to each their own ship, I guess.","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsnb","is_submitter":false,"link_id":"t3_7upyc0","parent_id":"t1_dtppyry","permalink":"/r/alteredcarbon/comments/7upyc0/season_1_series_discussion/dtqrsnb/","retrieved_on":1518931297,"score":2,"stickied":false,"subreddit":"alteredcarbon","subreddit_id":"t5_3bzvp","subreddit_type":"public"}
{"author":"immortalis","author_flair_css_class":"vikings","author_flair_text":"Vikings","body":"The ghost of MN kickers will haunt this game.","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsnc","is_submitter":false,"link_id":"t3_7vad8n","parent_id":"t3_7vad8n","permalink":"/r/nfl/comments/7vad8n/super_bowl_lii_game_thread_philadelphia_eagles/dtqrsnc/","retrieved_on":1518931297,"score":2,"stickied":false,"subreddit":"nfl","subreddit_id":"t5_2qmg3","subreddit_type":"public"}
{"author":"KryptoFreak405","author_flair_css_class":"48","author_flair_text":"","body":"His original backstory had him training to be an Imperial officer until a commanding officer ordered him to transport a shipment of slaves. He refused, freed the slaves, one of which was Chewie, and defected to become a smuggler","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsnd","is_submitter":false,"link_id":"t3_7vanzc","parent_id":"t1_dtqr5q5","permalink":"/r/StarWars/comments/7vanzc/solo_a_star_wars_story_big_game_tv_spot/dtqrsnd/","retrieved_on":1518931297,"score":1102,"stickied":false,"subreddit":"StarWars","subreddit_id":"t5_2qi4s","subreddit_type":"public"}
{"author":"thwinks","author_flair_css_class":null,"author_flair_text":null,"body":"Oh. TIL","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsne","is_submitter":false,"link_id":"t3_7v8o0z","parent_id":"t1_dtqg97a","permalink":"/r/gifs/comments/7v8o0z/silly_walk_champion/dtqrsne/","retrieved_on":1518931297,"score":2,"stickied":false,"subreddit":"gifs","subreddit_id":"t5_2qt55","subreddit_type":"public"}
{"author":"Mimi108","author_flair_css_class":"lions","author_flair_text":"Lions","body":"The Big. The Dick. The Nick. ","can_gild":true,"controversiality":0,"created_utc":1517788800,"distinguished":null,"edited":false,"gilded":0,"id":"dtqrsnf","is_submitter":false,"link_id":"t3_7vad8n","parent_id":"t3_7vad8n","permalink":"/r/nfl/comments/7vad8n/super_bowl_lii_game_thread_philadelphia_eagles/dtqrsnf/","retrieved_on":1518931297,"score":2,"stickied":false,"subreddit":"nfl","subreddit_id":"t5_2qmg3","subreddit_type":"public"}

代码示例 1，可以正常工作：

$ cat head_rc.txt | jq -r 'select(.subreddit=="nfl") .author'
kygiacomo
immortalis
Mimi108

代码示例 2，这对我来说是错误的或出乎意料的：

$ cat head_rc.txt | jq -r 'select(.subreddit=="nfl") .body, .author'
403and780
lol missed the extra wtf
kygiacomo
shitpostlord4321
namohysip
SDsc0rch
scarletcrawford
The ghost of MN kickers will haunt this game.
immortalis
KryptoFreak405
thwinks
The Big. The Dick. The Nick. 
Mimi108

不幸的是，您可以看到作者 403and780 对曲棍球 subreddit 发表了评论，而不是 nfl。

4

2 回答 2

2

一旦我得到正确的语法，还需要添加流。

一些好消息——你不需要使用所谓的“流解析器”，因为你的输入已经被切碎了。仅当输入具有一个或多个单独的巨大 JSON 实体，而您有一个（长）小 JSON 对象流时，才需要“流解析器”。

ps

正如查尔斯达菲建议的那样，选择问题的最简单解决方案是使用括号

jq -r 'select(.subreddit=="nfl") | (.body, .author)' input.json

如果 CSV 或 TSV 有意义，则将括号更改为方括号，并添加 @csv 或 @tsv，例如

select(.subreddit=="nfl") | [.body, .author] | @tsv
于 2018-03-02T17:56:17.443 回答
2

jq解决方案：

jq -r 'select(.subreddit == "nfl") as $o | $o.body, $o.author' head_rc.txt
  • ... as $o- 将过滤后的对象分配给变量o

输出：

lol missed the extra wtf
kygiacomo
The ghost of MN kickers will haunt this game.
immortalis
The Big. The Dick. The Nick. 
Mimi108
于 2018-03-02T17:47:25.187 回答