たとえばこういう JSON があったとして、
{"profile_use_background_image":true,"protected":false,"profile_banner_url":"https:\/\/si0.twimg.com\/brand_banners\/twitter\/1323368512\/live","default_profile":false,"lang":"en","profile_text_color":"333333","followers_count":7610082,"profile_image_url":"http:\/\/a0.twimg.com\/profile_images\/1124040897\/at-twitter_normal.png","name":"Twitter","show_all_inline_media":true,"profile_background_image_url":"http:\/\/a1.twimg.com\/profile_background_images\/378245879\/Twitter_1544x2000.png","created_at":"Tue Feb 20 14:35:54 +0000 2007","utc_offset":-28800,"profile_link_color":"038543","profile_image_url_https":"https:\/\/si0.twimg.com\/profile_images\/1124040897\/at-twitter_normal.png","description":"Always wondering what's happening. ","profile_background_image_url_https":"https:\/\/si0.twimg.com\/profile_background_images\/378245879\/Twitter_1544x2000.png","time_zone":"Pacific Time (US & Canada)","default_profile_image":false,"geo_enabled":true,"notifications":false,"friends_count":823,"profile_background_color":"ACDED6","screen_name":"twitter","status":{"in_reply_to_user_id_str":null,"geo":null,"entities":{"hashtags":[],"urls":[{"expanded_url":"http:\/\/blog.twitter.com\/2012\/02\/post-bowl-twitter-analysis.html","indices":[27,47],"display_url":"blog.twitter.com\/2012\/02\/post-b\u2026","url":"http:\/\/t.co\/OYYSRSew"}],"user_mentions":[],"media":[{"type":"photo","expanded_url":"http:\/\/twitter.com\/twitter\/status\/166629198054690816\/photo\/1","media_url_https":"https:\/\/p.twimg.com\/Ak_8X2-CEAA96Wx.png","indices":[48,68],"display_url":"pic.twitter.com\/M0AtLQVd","sizes":{"small":{"h":126,"w":340,"resize":"fit"},"thumb":{"h":150,"w":150,"resize":"crop"},"medium":{"h":205,"w":555,"resize":"fit"},"large":{"h":205,"w":555,"resize":"fit"}},"id_str":"166629198058885120","id":166629198058885120,"url":"http:\/\/t.co\/M0AtLQVd","media_url":"http:\/\/p.twimg.com\/Ak_8X2-CEAA96Wx.png"}]},"retweet_count":436,"in_reply_to_screen_name":null,"place":null,"created_at":"Mon Feb 06 21:07:52 +0000 2012","contributors":[7694352],"possibly_sensitive":false,"in_reply_to_status_id":null,"in_reply_to_user_id":null,"favorited":false,"truncated":false,"id_str":"166629198054690816","coordinates":null,"source":"web","in_reply_to_status_id_str":null,"retweeted":false,"id":166629198054690816,"text":"Post-Bowl Twitter analysis http:\/\/t.co\/OYYSRSew http:\/\/t.co\/M0AtLQVd"},"following":false,"profile_background_tile":true,"favourites_count":16,"is_translator":false,"profile_sidebar_fill_color":"F6F6F6","location":"San Francisco, CA","id_str":"783214","follow_request_sent":false,"verified":true,"profile_sidebar_border_color":"EEEEEE","url":"http:\/\/blog.twitter.com\/","id":783214,"listed_count":68652,"contributors_enabled":true,"statuses_count":1266}
見づらいので vimrc に1行書いてあげると、
map <Leader>j !python -m json.tool<CR>
範囲選択してから <Leader> j でキレイに整形してくれます。
{
"contributors_enabled": true,
"created_at": "Tue Feb 20 14:35:54 +0000 2007",
"default_profile": false,
"default_profile_image": false,
"description": "Always wondering what's happening. ",
"favourites_count": 16,
"follow_request_sent": false,
"followers_count": 7610082,
"following": false,
"friends_count": 823,
"geo_enabled": true,
"id": 783214,
"id_str": "783214",
"is_translator": false,
"lang": "en",
"listed_count": 68652,
"location": "San Francisco, CA",
"name": "Twitter",
"notifications": false,
"profile_background_color": "ACDED6",
"profile_background_image_url": "http://a1.twimg.com/profile_background_images/378245879/Twitter_1544x2000.png",
"profile_background_image_url_https": "https://si0.twimg.com/profile_background_images/378245879/Twitter_1544x2000.png",
"profile_background_tile": true,
"profile_banner_url": "https://si0.twimg.com/brand_banners/twitter/1323368512/live",
"profile_image_url": "http://a0.twimg.com/profile_images/1124040897/at-twitter_normal.png",
"profile_image_url_https": "https://si0.twimg.com/profile_images/1124040897/at-twitter_normal.png",
"profile_link_color": "038543",
"profile_sidebar_border_color": "EEEEEE",
"profile_sidebar_fill_color": "F6F6F6",
"profile_text_color": "333333",
"profile_use_background_image": true,
"protected": false,
"screen_name": "twitter",
"show_all_inline_media": true,
"status": {
"contributors": [
7694352
],
"coordinates": null,
"created_at": "Mon Feb 06 21:07:52 +0000 2012",
"entities": {
"hashtags": [],
"media": [
{
"display_url": "pic.twitter.com/M0AtLQVd",
"expanded_url": "http://twitter.com/twitter/status/166629198054690816/photo/1",
"id": 166629198058885120,
"id_str": "166629198058885120",
"indices": [
48,
68
],
"media_url": "http://p.twimg.com/Ak_8X2-CEAA96Wx.png",
"media_url_https": "https://p.twimg.com/Ak_8X2-CEAA96Wx.png",
"sizes": {
"large": {
"h": 205,
"resize": "fit",
"w": 555
},
"medium": {
"h": 205,
"resize": "fit",
"w": 555
},
"small": {
"h": 126,
"resize": "fit",
"w": 340
},
"thumb": {
"h": 150,
"resize": "crop",
"w": 150
}
},
"type": "photo",
"url": "http://t.co/M0AtLQVd"
}
],
"urls": [
{
"display_url": "blog.twitter.com/2012/02/post-b\u2026",
"expanded_url": "http://blog.twitter.com/2012/02/post-bowl-twitter-analysis.html",
"indices": [
27,
47
],
"url": "http://t.co/OYYSRSew"
}
],
"user_mentions": []
},
"favorited": false,
"geo": null,
"id": 166629198054690816,
"id_str": "166629198054690816",
"in_reply_to_screen_name": null,
"in_reply_to_status_id": null,
"in_reply_to_status_id_str": null,
"in_reply_to_user_id": null,
"in_reply_to_user_id_str": null,
"place": null,
"possibly_sensitive": false,
"retweet_count": 436,
"retweeted": false,
"source": "web",
"text": "Post-Bowl Twitter analysis http://t.co/OYYSRSew http://t.co/M0AtLQVd",
"truncated": false
},
"statuses_count": 1266,
"time_zone": "Pacific Time (US & Canada)",
"url": "http://blog.twitter.com/",
"utc_offset": -28800,
"verified": true
}
たぶん Python 2.6 以上が入ってないと使えないと思います。