Python single statement dictionary generator

Question

Is there a way in Python to do

new_list = [x for x in items]

(list comprehension) for a dictionary? Something like

new_dict = [x=>y for x, y in items.iteritems()]

so that I get

{x: y}

Note: in this specific case, you could just do: `new_dict = dict(items.iteritems())`. — , Feb 27 '14 at 22:25

score 5 · Accepted Answer · answered Feb 27 '14 at 22:18

5

Yes, by using:

{x: y for x, y in items.iteritems()}

It's called a dict comprehension, and you need Python 2.7 or newer for that syntax.

In Python 2.6 and earlier, use a generator expression and the dict() callable, feeding it (key, value) tuples:

dict((x, y) for x, y in items.iteritems())

answered Feb 27 '14 at 22:18

Martijn Pieters

Perfect! And thanks for the right term and reference too – A23 Feb 27 '14 at 22:19
Good job for keeping it backwards compatible with a 2.6 example. – Russia Must Remove Putin Feb 27 '14 at 22:30

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