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

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

About the author Watch on YouTube

Connect:

Subscribe to our YouTube Channel here