问题描述
因此，我正在开发一个项目，该项目会在每次特定日期（例如“周一 22:00:00”）时发送一条 discord 消息。该消息包括我那周最常听的专辑。每当我获得访问 JSON 的 URL 时，我都会使代码正常工作，其中包含多个指向图像的链接。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"
},"size": "mega"
},"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"
},{
"name": "Nookie","url": "https://www.last.fm/music/Limp+Bizkit/_/Nookie","duration": "289","@attr": {
"rank": "3"
},{
"name": "Break Stuff","url": "https://www.last.fm/music/Limp+Bizkit/_/Break+Stuff","duration": "166","@attr": {
"rank": "4"
},{
"name": "Re-Arranged","url": "https://www.last.fm/music/Limp+Bizkit/_/Re-Arranged","duration": "354","@attr": {
"rank": "5"
},{
"name": "I'm broke","url": "https://www.last.fm/music/Limp+Bizkit/_/I%27m+broke","duration": "239","@attr": {
"rank": "6"
},{
"name": "Nobody Like You","url": "https://www.last.fm/music/Limp+Bizkit/_/Nobody+Like+You","duration": "260","@attr": {
"rank": "7"
},{
"name": "Don't Go Off Wandering","url": "https://www.last.fm/music/Limp+Bizkit/_/Don%27t+Go+Off+Wandering","@attr": {
"rank": "8"
},{
"name": "9 Teen 90 Nine","url": "https://www.last.fm/music/Limp+Bizkit/_/9+Teen+90+Nine","duration": "276","@attr": {
"rank": "9"
},{
"name": "N 2 Gether Now","url": "https://www.last.fm/music/Limp+Bizkit/_/N+2+Gether+Now","@attr": {
"rank": "10"
},{
"name": "Trust?","url": "https://www.last.fm/music/Limp+Bizkit/_/Trust%3F","duration": "299","@attr": {
"rank": "11"
},{
"name": "No Sex","url": "https://www.last.fm/music/Limp+Bizkit/_/No+Sex","duration": "234","@attr": {
"rank": "12"
},{
"name": "Show Me What You Got","url": "https://www.last.fm/music/Limp+Bizkit/_/Show+Me+What+You+Got","duration": "266","@attr": {
"rank": "13"
},{
"name": "A Lesson Learned","url": "https://www.last.fm/music/Limp+Bizkit/_/A+Lesson+Learned","duration": "160","@attr": {
"rank": "14"
},{
"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"
},{
"name": "[silence]","url": "https://www.last.fm/music/Limp+Bizkit/_/%5Bsilence%5D","duration": "4","@attr": {
"rank": "16"
},"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,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 "size": "" 上方的链接，因为此图像具有最高分辨率。我如何才能做到这一点？我用 Python 制作了 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！
解决方法
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“大型”图像 URL，您可以使用列表推导式遍历图像列表：
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