Python iterators/ one liner for loop

Question

This may be obvious, but I'm stuck as to whether I can use an iterator/one liner to achieve the following:

TEAMS = [u'New Zealand', u'USA']
dict = {}

How can I write:

for team in TEAMS:
    dict[team] = u'Rugby'

as an iterator, for example:

 (dict[team] = u'Rugby' for team in TEAMS) # Or perhaps
 [dict[team] for team in TEAMS] = u'Rugby

Can it be done, where do the parentheses need to be placed?

Required output:

dict = {u'New Zealand': u'Rugby', u'USA': u'Rugby'}

I know there are lots of questions related to iterators in python, so I apologize if this has an answer, I have tried looking and couldn't find a good answer to this particular issue.

If the value is an immutable object then you can simply do: `dict.fromkeys(TEAMS, u'Rugby')`. — Ashwini Chaudhary, Nov 09 '16 at 11:06

pt12lol · Accepted Answer · 2016-11-09T11:14:58.760

3

You can use dict comprehension. Take a look below:

TEAMS = [u'New Zealand', u'USA']
d = {team: 'Rugby' for team in TEAMS}

edited Nov 09 '16 at 11:14

answered Nov 09 '16 at 11:06

pt12lol

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you might want to rename your variable to a non built-in type – Julien Spronck Nov 09 '16 at 11:14
done. just provided the same name as the author had. – pt12lol Nov 09 '16 at 11:15

score 1 · Answer 2 · answered Nov 09 '16 at 12:12

1

use dict fromkeys method. Also, not recommended to use keyword dict as var name, change to d instead

TEAMS = [u'New Zealand', u'USA']
d = {}.fromkeys(TEAMS, u'Rugby')
# d = {u'New Zealand': u'Rugby', u'USA': u'Rugby'}

answered Nov 09 '16 at 12:12

Skycc

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score 0 · Answer 3 · answered Nov 09 '16 at 11:14

0

for team in TEAMS:
    dict.update({team: u'Rugby'})

answered Nov 09 '16 at 11:14

vsr

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score 0 · Answer 4 · answered Nov 09 '16 at 11:24

0

TEAMS = [u'New Zealand', u'USA']    
dict(zip(TEAMS, ['Rugby'] * 2))

answered Nov 09 '16 at 11:24

gipsy

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Python iterators/ one liner for loop

4 Answers4

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