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Python String | isalnum method
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schedule Mar 10, 2022
Last updated Python
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expand_more Python's str.isalnum() method returns a boolean indicating whether all characters in a string are alphanumeric (i.e. alphabet letter (a - z) or number (0 - 9)).
Parameters
No parameters.
Return value
A single boolean indicating whether or not all the characters in a string are alphanumeric.
Examples
Alphanumeric
To check whether all characters in 'SkyTowner123' are alphanumeric:
x = 'SkyTowner123'x.isalnum()
True
Not alphanumeric
To check whether all characters in 'Sky Towner 123' are alphanumeric:
y = 'Sky Towner 123'y.isalnum()False
False
The space character is not alphanumeric hence False is returned.
To check whether all characters in 'SkyTowner!123' are alphanumeric:
z = 'SkyTowner!123'z.isalnum()
False
The ! character is not alphanumeric hence False is returned.
Published by Isshin Inada
Edited by 0 others
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Official Python Documentation
https://docs.python.org/3/library/stdtypes.html#str.isalnum
