Python-用列表項填充字典

Question

如果以這種方式創建字典：

output = {'playlist': {}}

有這樣的list ：

tracks = [u'No Surprises', u'Oceans', u'Up in Flames']

與

count = 0

我想將所有tracks項作為keys為0值填充鍵playlist ，如下所示：

output = {'playlist': {
               'No Surprises': 0,
               'Oceans': 0,
               'Up in Flames': 0}}

我怎么做？

Answer 1

>>> output['playlist'] = dict(zip(tracks, [value for i in tracks]))
>>> output
{'playlist': {u'Up in Flames': 0, u'Oceans': 0, u'No Surprises': 0}}

Answer 2

output = {'playlist':{track: count for track in tracks}}

Answer 3

遲了將近兩年，但這似乎是dict.fromkeys的理想用例：

output = {'playlist': dict.fromkeys(tracks, count)}

Answer 4

for track in tracks:
    output["playlist"][track] = 0