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Checking if a string is empty in Python

schedule Aug 11, 2023
Last updated
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Python
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In Python any object can be tested for truth value (true or false).

Empty sequences and collections such as '', (), [], {}, set(), range(0) are considered false.

We can combine this with the boolean operation not x:

Operation

Return value

not x

If x is false, then True, else False

Examples

Empty string

To check whether x is an empty string:

x = ''
not x
True

As x is an empty string that has truth value false, not x returns True.

Not empty string

To check whether y is an empty string:

y = 'abc'
not y
False

As y is not an empty string, it has truth value true hence not y returns False.

robocat
Published by Isshin Inada
Edited by 0 others
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