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Python Dictionary | fromkeys method
schedule Aug 10, 2023
Last updated local_offer
Tags Python
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Python's dict.fromkeys(~) method returns a new dictionary from the provided iterable and values.
Parameters
1. iterable | any
The iterable or elements to be used as keys for the new dictionary.
2. valuelink | any | optional
The value to set each element of the dictionary. Defaults to None.
Return value
A new dictionary from the provided iterable and values.
Examples
Basic usage
To create a new dictionary from tuple my_cars:
my_cars = ('Ferrari', 'Porsche', 'Aston Martin')dict.fromkeys(my_cars)
{'Ferrari': None, 'Porsche': None, 'Aston Martin': None}
Note that elements from the tuple my_cars serve as keys for the new dictionary and each key has default value None.
Value parameter
To assign the value 'Sky Towner' to represent the owner of each car in the new dictionary:
my_cars = ['Ferrari', 'Porsche', 'Aston Martin']dict.fromkeys(my_cars, 'Sky Towner')
{'Ferrari': 'Sky Towner', 'Porsche': 'Sky Towner', 'Aston Martin': 'Sky Towner'}
Note that the value for all keys in the new dictionary is now 'Sky Towner'.
Published by Isshin Inada
Edited by 0 others
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Official Python Documentation
https://docs.python.org/3/library/stdtypes.html#dict.fromkeys
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