Python - Populate a dictionary with list items

Question

If a create a dictionary in this fashion:

output = {'playlist': {}}

having a list like this:

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

and with

count = 0

I would like to populate the key playlist with all tracks items as keys with 0 value, like this:

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

How do I do that?

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

迟了将近两年，但这似乎是dict.fromkeys的理想用例：

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

Answer 4

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