isidentifier() : Check if string is identifier or not, True or False is returned

my_str.isidentifier())

Returns True if the string is an identifier. Otherwise returns False.
Identifiers are names used to create objects, variables, functions, modules etc.

What is identifier ( Rules )

Only lower or upper case chars , digits and underscore are allowed.
We can't start identifier name with digit.
$ , # , @, !, % ,special chars and space can't be used with identifiers
We can't use reserved keywords as identifiers.

my_str='_abc45'
print(my_str.isidentifier()) # Output is True

my_str='ab#cd'
print(my_str.isidentifier()) # Output is False ( # not allowed )

my_str='A_abc1234'
print(my_str.isidentifier()) # Output is True

my_str='pq?rs'              
print(my_str.isidentifier()) # Output is False ( ? not allowed)

my_str='pq rs'              
print(my_str.isidentifier()) # Output is False ( space not allowed)

my_str='12ab'              
print(my_str.isidentifier())#Output is False( Can't start with number)

All String methods variables & identifiers in Python

isalnum() isdecimal() Python- Tutorials

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