Question

我有dictionary：

 playlists = {
    u'user1': {u'Make You Feel My Love': 1.0, u'I See Fire': 1.0, u'High And Dry': 1.0, u'Fake Plastic Trees': 1.0, u'One': 1.0, u'Goodbye My Lover': 1.0, u'No Surprises': 1.0}, 
    u'user2': {u'Fake Plastic Trees': 1.0, u'High And Dry': 1.0, u'No Surprises': 1.0}, 
    u'user3': {u'Codex': 1.0, u'No Surprises': 1.0, u'O': 1.0, u'Go It Alone': 1.0}, 
    u'user4': {u'No Distance Left To Run': 1.0, u'Running Up That Hill': 1.0, u'Fake Plastic Trees': 1.0, u'The Numbers': 1.0, u'No Surprises': 1.0}, u'user5': {u'Wild Wood': 1.0, u'You Do Something To Me': 1.0, u'Reprise': 1.0}}

我正在尝试抓取float values。

使用：

print playlist.keys()[0]
print [p for p in playlist.values()[0]]

我成功了。

但是如果我尝试[p.values() for p in playlist.values()]，我会收到以下错误：

AttributeError: 'unicode' object has no attribute 'values'

我如何获得values？

Answer 1

您将dict定义为＆＃34;播放列表＆＃34; （复数）但在你以后的代码片段中，你处理一个名为＆＃34;播放列表＆＃34;的变量。（单数）。 FWIW，使用原始playlists定义，您的列表组合完美地工作（或课程）：

>>> playlists = {
...     u'user1': {u'Make You Feel My Love': 1.0, u'I See Fire': 1.0, u'High And Dry': 1.0, u'Fake Plastic Trees': 1.0, u'One': 1.0, u'Goodbye My Lover': 1.0, u'No Surprises': 1.0}, 
...     u'user2': {u'Fake Plastic Trees': 1.0, u'High And Dry': 1.0, u'No Surprises': 1.0}, 
...     u'user3': {u'Codex': 1.0, u'No Surprises': 1.0, u'O': 1.0, u'Go It Alone': 1.0}, 
...     u'user4': {u'No Distance Left To Run': 1.0, u'Running Up That Hill': 1.0, u'Fake Plastic Trees': 1.0, u'The Numbers': 1.0, u'No Surprises': 1.0}, u'user5': {u'Wild Wood': 1.0, u'You Do Something To Me': 1.0, u'Reprise': 1.0}}
>>> [p.values() for p in playlists.values()]
[[1.0, 1.0, 1.0, 1.0, 1.0], [1.0, 1.0, 1.0], [1.0, 1.0, 1.0], [1.0, 1.0, 1.0, 1.0], [1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0]]

IOW，请了解最新完整和可验证＆＃34;例子意味着......

Python - 'unicode'对象没有属性'values'

1 个答案: