Set to dict Python

Question

is there any pythonic way to convert a set into a dict?

I got the following set

s = {1,2,4,5,6}

and want the following dict

<         


        

Answer 1

Use dict.fromkeys():

c = dict.fromkeys(s, 0)

Demo:

>>> s = {1,2,4,5,6}
>>> dict.fromkeys(s, 0)
{1: 0, 2: 0, 4: 0, 5: 0, 6: 0}

This works for lists as well; it is the most efficient method to create a dictionary from a sequence. Note all values are references to that one default you passed into dict.fromkeys(), so be careful when that default value is a mutable object.