isalnum()

my_str.isalnum())

Checks for alphanumeric characters in a string. Returns True if only number and alphabets are present and returns False if any thing other than alphanumeric characters are present.

my_str='plus2net'
print(my_str.isalnum())      # Output is True

my_str='Welcome to plus2net'
print(my_str.isalnum())      # Output is False (presence of Space)

All String methods

isalpha() isdecimal() Python- Tutorials

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