Use list elements to initalise dictionary of empty lists Python

Question

I have a list. I want to use its elements to initialise a dictionary, which n pairs of key:list().

Current input :

names = ['John', 'Jane', 'Mark']

desired output after transformation :

names_dict = {'John': list(), 'Jane': list(), 'Mark': list()}

The easiest way I see is appending iteratively the key:list() pairs in a for loop. Are there any more pythonic ways of doing this transformation ?

Selcuk · Answer 1 · 2021-06-03T00:14:45.137

1

A dict comprehension is not much different than a for loop but slightly more pythonic:

names_dict = {name: list() for name in names}

edited Jun 03 '21 at 00:14

answered Jun 03 '21 at 00:09

Selcuk

57,004
12
102
110

I didn't know dict comprehesions were a thing. This changes a lot – Louis GRIMALDI Jun 03 '21 at 00:10
Only knew about generators expression and list comprehesions. Thank you @Selcuk – Louis GRIMALDI Jun 03 '21 at 00:11

Use list elements to initalise dictionary of empty lists Python

1 Answers1