Convert two lists into a dictionary


Question

Imagine that you have:

keys = ['name', 'age', 'food']
values = ['Monty', 42, 'spam']

What is the simplest way to produce the following dictionary?

a_dict = {'name' : 'Monty', 'age' : 42, 'food' : 'spam'}
1
1026
6/26/2019 12:26:43 PM

Accepted Answer

Like this:

>>> keys = ['a', 'b', 'c']
>>> values = [1, 2, 3]
>>> dictionary = dict(zip(keys, values))
>>> print(dictionary)
{'a': 1, 'b': 2, 'c': 3}

The pairwise dict constructor and zip function are awesomely useful: https://docs.python.org/3/library/functions.html#func-dict

1836
7/29/2019 9:13:04 PM

Try this:

>>> import itertools
>>> keys = ('name', 'age', 'food')
>>> values = ('Monty', 42, 'spam')
>>> adict = dict(itertools.izip(keys,values))
>>> adict
{'food': 'spam', 'age': 42, 'name': 'Monty'}

In Python 2, it's also more economical in memory consumption compared to zip.


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