Python YouTube Gdata 播放器错误

Question

我在尝试做一件很简单的事情：从youtube的gdata模块获取一份玩家网址的列表。

def getlist():
  index = 1
  prev = 0
  urls = []
  while True:
    uri = "http://gdata.youtube.com/feeds/api/playlists/E005D335B57338D1?start-index=%i&max-results=50" % index
    feed = yt_service.GetYouTubeVideoFeed(uri)
    for entry in feed.entry:
      urls.append(entry.media.player.url)
    if prev == len(urls): break
    prev = len(urls)
    index += 50
  return urls

但是，当我调用getlist的时候，出现了以下错误：

>>> urls = getlist()
Traceback (most recent call last):
  File "<pyshell#2>", line 1, in <module>
    getlist()
  File "<pyshell#1>", line 9, in getlist
    urls.append(entry.media.player.url)
AttributeError: 'NoneType' object has no attribute 'url'

我不知道为什么会这样，几周前还可以用……有什么想法吗？

Answer 1

你应该加一个检查，确保玩家对象不是空的：

...
for entry in feed.entry:
  if entry.media.player is not None:
    urls.append(entry.media.player.url)
...