In this source code example, we will demonstrate how to use the Python string isalnum() method to check if all characters in the string are alphanumeric.

Use the Python string isalnum() method to determine if all characters in the string are alphanumeric.

Python string isalnum() method example

The following example uses the isalnum() method to check if the string 'Python3' contains only alphanumeric characters:

version = 'Python3'
result = version.isalnum()

print(result)

Output:

True

The following example returns False because the string 'Python 3' contains whitespace:

version = 'Python 3'
result = version.isalnum()

print(result)

Output:

False

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