Hash from two arrays/lists in python

Question

Using two Arrays of equal length, how can I create a Hash object where the elements from one array (the keys) are linked to the elements of the other (the values).

For example in Java I can use HashMap:

String[] keys= {"apple", "banana", "cherry"};
int[] vals= {1, 2, 3};
HashMap<String, Integer> hash= new HashMap<String, Integer>();

for(int i= 0; i < keys.length; i++){
   hash.put(keys[i], vals[i]);
}

How could do this Python?

Simply dict(zip(keys, vals))

vaultah
– vaultah

2017-05-21 10:24:08 +00:00
Commented May 21, 2017 at 10:24 — vaultah
– vaultah, Commented May 21, 2017 at 10:24

Jared Goguen · Accepted Answer · 2017-05-21 13:27:25Z

7

For posterity, it seems like this should be added as a formal answer. (Taken from the comments.)

dict(zip(keys, vals))

answered May 21, 2017 at 13:27

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Jared Goguen

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Comments

Sash Sinha · Accepted Answer · 2017-05-21 10:24:45Z

3

You can use zip inside a dictionary comprehension to achieve the same result in python:

>>> keys = ['apple', 'banana', 'cherry']
>>> values = [1, 2, 3]
>>> hash = {key: value for key, value in zip(keys, values)}
>>> hash
{'apple': 1, 'banana': 2, 'cherry': 3}

answered May 21, 2017 at 10:24

Sash Sinha

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