Python dictionary creation syntax

Question

I\'m wondering if there\'s any way to populate a dictionary such that you have multiple keys mapping to the same value that\'s less verbose than say:

d = {1:         


        

Answer 1

For your case

dict([(_, 'yes') for _ in range(1,4)], **{4:'no'})

And if you need multiple keys for 'yes' and 'no'

>>> from itertools import chain
>>> dict(chain([(_, 'yes') for _ in range(1,4)], [(_, 'no') for _ in range(4, 10)]))
{1: 'yes', 2: 'yes', 3: 'yes', 4: 'no', 5: 'no', 6: 'no', 7: 'no', 8: 'no', 9: 'no'}

Not so great, but works.