python - 读取 JSON 文件以获得最高分辨率的图像 (Last.FM)
问题描述
因此，我正在开发一个项目，该项目每次在某个特定日期发送一条 Discord 消息，例如“周一 22:00:00”。该消息包括我那一周听得最多的专辑。每当我获得指向 JSON 的 URL 时，我的代码就可以正常工作，其中包括多个图像链接。这是我得到的 JSON 响应：
{
"album": {
"name": "Significant Other",
"artist": "Limp Bizkit",
"mbid": "be3e00aa-368a-3f09-ac96-cd094e9a7151",
"url": "https://www.last.fm/music/Limp+Bizkit/Significant+Other",
"image": [{
"#text": "https://lastfm.freetls.fastly.net/i/u/34s/1c00f7b9cd94c2b6fbd7f12fc00bd8d2.png",
"size": "small"
}, {
"#text": "https://lastfm.freetls.fastly.net/i/u/64s/1c00f7b9cd94c2b6fbd7f12fc00bd8d2.png",
"size": "medium"
}, {
"#text": "https://lastfm.freetls.fastly.net/i/u/174s/1c00f7b9cd94c2b6fbd7f12fc00bd8d2.png",
"size": "large"
}, {
"#text": "https://lastfm.freetls.fastly.net/i/u/300x300/1c00f7b9cd94c2b6fbd7f12fc00bd8d2.png",
"size": "extralarge"
}, {
"#text": "https://lastfm.freetls.fastly.net/i/u/300x300/1c00f7b9cd94c2b6fbd7f12fc00bd8d2.png",
"size": "mega"
}, {
"#text": "https://lastfm.freetls.fastly.net/i/u/300x300/1c00f7b9cd94c2b6fbd7f12fc00bd8d2.png",
"size": ""
}],
"listeners": "774409",
"playcount": "10274552",
"tracks": {
"track": [{
"name": "Intro",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Intro",
"duration": "78",
"@attr": {
"rank": "1"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "Just Like This",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Just+Like+This",
"duration": "215",
"@attr": {
"rank": "2"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "Nookie",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Nookie",
"duration": "289",
"@attr": {
"rank": "3"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "Break Stuff",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Break+Stuff",
"duration": "166",
"@attr": {
"rank": "4"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "Re-Arranged",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Re-Arranged",
"duration": "354",
"@attr": {
"rank": "5"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "I'm Broke",
"url": "https://www.last.fm/music/Limp+Bizkit/_/I%27m+Broke",
"duration": "239",
"@attr": {
"rank": "6"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "Nobody Like You",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Nobody+Like+You",
"duration": "260",
"@attr": {
"rank": "7"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "Don't Go Off Wandering",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Don%27t+Go+Off+Wandering",
"duration": "239",
"@attr": {
"rank": "8"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "9 Teen 90 Nine",
"url": "https://www.last.fm/music/Limp+Bizkit/_/9+Teen+90+Nine",
"duration": "276",
"@attr": {
"rank": "9"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "N 2 Gether Now",
"url": "https://www.last.fm/music/Limp+Bizkit/_/N+2+Gether+Now",
"duration": "289",
"@attr": {
"rank": "10"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "Trust?",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Trust%3F",
"duration": "299",
"@attr": {
"rank": "11"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "No Sex",
"url": "https://www.last.fm/music/Limp+Bizkit/_/No+Sex",
"duration": "234",
"@attr": {
"rank": "12"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "Show Me What You Got",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Show+Me+What+You+Got",
"duration": "266",
"@attr": {
"rank": "13"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "A Lesson Learned",
"url": "https://www.last.fm/music/Limp+Bizkit/_/A+Lesson+Learned",
"duration": "160",
"@attr": {
"rank": "14"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "Outro / Radio Sucks / The Mind of Les",
"url": "https://www.last.fm/music/Limp+Bizkit/_/Outro+%2F+Radio+Sucks+%2F+The+Mind+of+Les",
"duration": "438",
"@attr": {
"rank": "15"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}, {
"name": "[silence]",
"url": "https://www.last.fm/music/Limp+Bizkit/_/%5Bsilence%5D",
"duration": "4",
"@attr": {
"rank": "16"
},
"streamable": {
"#text": "0",
"fulltrack": "0"
},
"artist": {
"name": "Limp Bizkit",
"mbid": "8f9d6bb2-dba4-4cca-9967-cc02b9f4820c",
"url": "https://www.last.fm/music/Limp+Bizkit"
}
}]
},
"tags": {
"tag": [{
"name": "albums I own",
"url": "https://www.last.fm/tag/albums+I+own"
}, {
"name": "Nu Metal",
"url": "https://www.last.fm/tag/Nu+Metal"
}, {
"name": "rapcore",
"url": "https://www.last.fm/tag/rapcore"
}, {
"name": "rock",
"url": "https://www.last.fm/tag/rock"
}, {
"name": "limp bizkit",
"url": "https://www.last.fm/tag/limp+bizkit"
}]
},
"wiki": {
"published": "11 Jul 2016, 20:19",
"summary": "Significant Other is the second album by American rap rock/nu metal band Limp Bizkit. Released in 1999 by Flip/Interscope Records, the album saw the band expanding its sound from that of its debut album Three Dollar Bill, Yall, to incorporate further metal and hip hop influences. Significant Other was co-produced by Terry Date and Limp Bizkit. The album has sold at least 16 million copies worldwide. <a href=\"http://www.last.fm/music/Limp+Bizkit/Significant+Other\">Read more on Last.fm</a>.",
"content": "Significant Other is the second album by American rap rock/nu metal band Limp Bizkit. Released in 1999 by Flip/Interscope Records, the album saw the band expanding its sound from that of its debut album Three Dollar Bill, Yall, to incorporate further metal and hip hop influences. Significant Other was co-produced by Terry Date and Limp Bizkit. The album has sold at least 16 million copies worldwide. <a href=\"http://www.last.fm/music/Limp+Bizkit/Significant+Other\">Read more on Last.fm</a>. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply."
}
}
}
我想获取上面的链接"size": ""，因为这张图片的分辨率最高。我该如何做到这一点？我使用 Python 制作 Discord 机器人，所以如果你能用 Python 语言解释，那就太好了！提前致谢！
解决方案
要将 JSON 字符串转换为 Python 对象，您可以使用：
import json
album_data = json.loads(album_json_string)
要提取“mega”图像 URL，您可以使用列表推导遍历图像列表：
images = album_data['album']['image']
mega_images = [i for i in images if i['size'] == 'mega']
try:
mega_image_url = mega_images[0]['image']
except IndexError:
#do something if the mega URL isn't present
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