Python

Question

我正在 for loop 中向 SPotify API 发出请求，如下所示：

track_ids = []
#get track_ids
for track in random.sample(pitchfork_tracks, 10):
    results = sp.search(q=track, type='track') #here I call Spotify endpoint
    items = results['tracks']['items']
    for t in items:
        track_ids.append(t['uri'])
return track_ids

我可以 print 每 t 好吧，但如果我尝试 return track_ids，请安慰 returns 我什么都没有。

日志告诉我：

2016-10-03 23:55:49 [requests.packages.urllib3.connectionpool] INFO: Starting new HTTPS connection (1): accounts.spotify.com
2016-10-03 23:55:50 [requests.packages.urllib3.connectionpool] DEBUG: "POST /api/token HTTP/1.1" 200 None
2016-10-03 23:55:50 [requests.packages.urllib3.connectionpool] INFO: Starting new HTTPS connection (1): api.spotify.com
2016-10-03 23:55:50 [requests.packages.urllib3.connectionpool] DEBUG: "GET /v1/search?q=Rushes&limit=10&type=track&offset=0 HTTP/1.1" 200 None
2016-10-03 23:55:50 [requests.packages.urllib3.connectionpool] INFO: Starting new HTTPS connection (1): api.spotify.com
2016-10-03 23:55:51 [requests.packages.urllib3.connectionpool] DEBUG: "GET /v1/search?q=Opposite+House&limit=10&type=track&offset=0 HTTP/1.1" 200 None
2016-10-03 23:55:51 [requests.packages.urllib3.connectionpool] INFO: Starting new HTTPS connection (1): api.spotify.com

看起来反复开始和结束连接与此有关...或者我在这里遗漏了一些明显的东西？

我该如何解决这个问题并设法构建我的 track_ids list？

Answer 1

track_ids 范围在您的函数内。要打印列表，您可以这样做

track_ids = yourfunction()
print track_ids

或

您可以使 track_ids 列表成为全局列表并在您的函数之外声明它。

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