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Checking if a given key already exists in a dictionary in Python
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schedule Jul 1, 2022
Last updated Python
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expand_more We can check if a key already exists in a dictionary by using the operator in
.
Example
To check if key2
already exists as a key in dictionary d
:
The above if-else
block is based on the fact that comparison using the in
operator returns a boolean:
d = {'key1': 1, 'key2': 2, 'key3': 3}
'key2' in d
True
Published by Isshin Inada
Edited by 0 others
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