如何遍历 Spotipy 的 playlist_items 函数中的嵌套列表并仅打印出我感兴趣的字段？
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【中文标题】如何遍历 Spotipy 的 playlist_items 函数中的嵌套列表并仅打印出我感兴趣的字段？【英文标题】：How do I iterate through a nested list from Spotipy's playlist_items function and only print out the fields I'm interested in? 【发布时间】：2021-12-28 05:00:31 【问题描述】：我正在尝试使用 Spotipy 从播放列表中获取所有曲目名称和相应的艺术家。我现在可以获取字段的 json 转储，但我无法弄清楚如何遍历转储并打印出我感兴趣的字段。
这是我用来获取有关播放列表的所有信息的内容：
playlist = spotipy.playlist_items(playlist_id)
如果我然后print(json.dumps(playlist, indent=2))，那么我得到以下输出：
"collaborative": false,
"description": "",
"external_urls":
"spotify": "https://open.spotify.com/playlist/50uWPcNFdJElMVZWo0IebB"
,
"followers":
"href": null,
"total": 0
,
"href": "https://api.spotify.com/v1/playlists/50uWPcNFdJElMVZWo0IebB?additional_types=track",
"id": "50uWPcNFdJElMVZWo0IebB",
"images": [
"height": 640,
"url": "https://i.scdn.co/image/ab67616d0000b273942a0c9ac8f1def7c8805044",
"width": 640
],
"name": "Spotipy Test",
"owner":
"display_name": "username",
"external_urls":
"spotify": "https://open.spotify.com/user/username"
,
"href": "https://api.spotify.com/v1/users/username",
"id": "username",
"type": "user",
"uri": "spotify:user:username"
,
"primary_color": null,
"public": false,
"snapshot_id": "Nyw0OTk4MDg1NDM3NzRlOWI2MGY2MDc2ZjMxNTE4OGFkZWQ5Y2QyZDdk",
"tracks":
"href": "https://api.spotify.com/v1/playlists/50uWPcNFdJElMVZWo0IebB/tracks?offset=0&limit=100&additional_types=track",
"items": [
"added_at": "2021-11-17T07:32:59Z",
"added_by":
"external_urls":
"spotify": "https://open.spotify.com/user/username"
,
"href": "https://api.spotify.com/v1/users/username",
"id": "username",
"type": "user",
"uri": "spotify:user:username"
,
"is_local": false,
"primary_color": null,
"track":
"album":
"album_type": "album",
"artists": [
"external_urls":
"spotify": "https://open.spotify.com/artist/6fOMl44jA4Sp5b9PpYCkzz"
,
"href": "https://api.spotify.com/v1/artists/6fOMl44jA4Sp5b9PpYCkzz",
"id": "6fOMl44jA4Sp5b9PpYCkzz",
"name": "NF",
"type": "artist",
"uri": "spotify:artist:6fOMl44jA4Sp5b9PpYCkzz"
],
"available_markets": [],
"external_urls":
"spotify": "https://open.spotify.com/album/46xdC4Qcvscfs3Ai2RIHcv"
,
"href": "https://api.spotify.com/v1/albums/46xdC4Qcvscfs3Ai2RIHcv",
"id": "46xdC4Qcvscfs3Ai2RIHcv",
"images": [
"height": 640,
"url": "https://i.scdn.co/image/ab67616d0000b273942a0c9ac8f1def7c8805044",
"width": 640
,
"height": 300,
"url": "https://i.scdn.co/image/ab67616d00001e02942a0c9ac8f1def7c8805044",
"width": 300
,
"height": 64,
"url": "https://i.scdn.co/image/ab67616d00004851942a0c9ac8f1def7c8805044",
"width": 64
],
"name": "The Search",
"release_date": "2019-07-26",
"release_date_precision": "day",
"total_tracks": 20,
"type": "album",
"uri": "spotify:album:46xdC4Qcvscfs3Ai2RIHcv"
,
"artists": [
"external_urls":
"spotify": "https://open.spotify.com/artist/6fOMl44jA4Sp5b9PpYCkzz"
,
"href": "https://api.spotify.com/v1/artists/6fOMl44jA4Sp5b9PpYCkzz",
"id": "6fOMl44jA4Sp5b9PpYCkzz",
"name": "NF",
"type": "artist",
"uri": "spotify:artist:6fOMl44jA4Sp5b9PpYCkzz"
],
"available_markets": [],
"disc_number": 1,
"duration_ms": 248053,
"episode": false,
"explicit": false,
"external_ids":
"isrc": "USUM71907048"
,
"external_urls":
"spotify": "https://open.spotify.com/track/3oLe5ZILASG8vU5dxIMfLY"
,
"href": "https://api.spotify.com/v1/tracks/3oLe5ZILASG8vU5dxIMfLY",
"id": "3oLe5ZILASG8vU5dxIMfLY",
"is_local": false,
"name": "The Search",
"popularity": 74,
"preview_url": "https://p.scdn.co/mp3-preview/c26b3dedc967f5009451a693ac275e50c6ecb53c?cid=1f51bd6bdbd94e34884f3ec17c0f68ed",
"track": true,
"track_number": 1,
"type": "track",
"uri": "spotify:track:3oLe5ZILASG8vU5dxIMfLY"
,
"video_thumbnail":
"url": null
,
"added_at": "2021-11-17T07:33:24Z",
"added_by":
"external_urls":
"spotify": "https://open.spotify.com/user/username"
,
"href": "https://api.spotify.com/v1/users/username",
"id": "username",
"type": "user",
"uri": "spotify:user:username"
,
"is_local": false,
"primary_color": null,
"track":
"album":
"album_type": "album",
"artists": [
"external_urls":
"spotify": "https://open.spotify.com/artist/3uL4UpqShC4p2x1dJutoRW"
,
"href": "https://api.spotify.com/v1/artists/3uL4UpqShC4p2x1dJutoRW",
"id": "3uL4UpqShC4p2x1dJutoRW",
"name": "Ghostemane",
"type": "artist",
"uri": "spotify:artist:3uL4UpqShC4p2x1dJutoRW"
],
"available_markets": [],
"external_urls":
"spotify": "https://open.spotify.com/album/4pzCKSWYNM2yUWrNvycC6e"
,
"href": "https://api.spotify.com/v1/albums/4pzCKSWYNM2yUWrNvycC6e",
"id": "4pzCKSWYNM2yUWrNvycC6e",
"images": [
"height": 640,
"url": "https://i.scdn.co/image/ab67616d0000b27347fa4895a04fbb517fd42070",
"width": 640
,
"height": 300,
"url": "https://i.scdn.co/image/ab67616d00001e0247fa4895a04fbb517fd42070",
"width": 300
,
"height": 64,
"url": "https://i.scdn.co/image/ab67616d0000485147fa4895a04fbb517fd42070",
"width": 64
],
"name": "Hexada",
"release_date": "2017-09-05",
"release_date_precision": "day",
"total_tracks": 10,
"type": "album",
"uri": "spotify:album:4pzCKSWYNM2yUWrNvycC6e"
,
"artists": [
"external_urls":
"spotify": "https://open.spotify.com/artist/3uL4UpqShC4p2x1dJutoRW"
,
"href": "https://api.spotify.com/v1/artists/3uL4UpqShC4p2x1dJutoRW",
"id": "3uL4UpqShC4p2x1dJutoRW",
"name": "Ghostemane",
"type": "artist",
"uri": "spotify:artist:3uL4UpqShC4p2x1dJutoRW"
],
"available_markets": [],
"disc_number": 1,
"duration_ms": 124538,
"episode": false,
"explicit": true,
"external_ids":
"isrc": "TCADG1741539"
,
"external_urls":
"spotify": "https://open.spotify.com/track/2Vc6NJ9PW9gD9q343XFRKx"
,
"href": "https://api.spotify.com/v1/tracks/2Vc6NJ9PW9gD9q343XFRKx",
"id": "2Vc6NJ9PW9gD9q343XFRKx",
"is_local": false,
"name": "Mercury: Retrograde",
"popularity": 76,
"preview_url": "https://p.scdn.co/mp3-preview/7d4cb282d38d48d85e9faedb3ea5e74546281d07?cid=1f51bd6bdbd94e34884f3ec17c0f68ed",
"track": true,
"track_number": 4,
"type": "track",
"uri": "spotify:track:2Vc6NJ9PW9gD9q343XFRKx"
,
"video_thumbnail":
"url": null
],
"limit": 100,
"next": null,
"offset": 0,
"previous": null,
"total": 2
,
"type": "playlist",
"uri": "spotify:playlist:50uWPcNFdJElMVZWo0IebB"
这仅适用于播放列表中的两首歌曲！
在这一点上，我对 python 的有限知识让我失望了，因为我不知道如何从这里开始。我要查找的只是曲目名称和相应的艺术家。
那么，我该如何遍历海量的嵌套列表，只打印出我感兴趣的字段呢？
【问题讨论】：
查看 Pyhon 文档，了解如何使用列表/字典：docs.python.org/3/tutorial/datastructures.html 【参考方案1】：您可以使用 fields 变量来指定您想要的信息。
例如与
playlist = sp.playlist_items(paylist_id, fields='items.track.artists.name,items.track.name'),
您只会得到艺术家姓名和曲目名称信息：
"items": ["track": "artists": ["name": "Avicii"], "name": "Levels - Radio Edit", "track": "artists": ["name": "Avicii"], "name": "Wake Me Up - Radio Edit"]
【讨论】：
好的，我现在明白了。我无法弄清楚如何遍历嵌套列表以上是关于如何遍历 Spotipy 的 playlist_items 函数中的嵌套列表并仅打印出我感兴趣的字段？的主要内容，如果未能解决你的问题，请参考以下文章