The Python String isidentifier() method is a built-in function that returns true if the string is a valid identifier. If not it returns False.
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In this article, we will learn about the Python String isidentifier() method with the help of examples.
isidentifier() Syntax
The Syntax of isidentifier() method is:
string.isidentifier()
isidentifier() Parameters
The isidentifier() method does not take any parameters.
isidentifier() Return Value
The isidentifier() method returns
-
Trueif string is a valid identifier -
Falseif the string is not a valid identifier
Checkout to documentation to learn more about What is a valid identifier in Python?
Example 1: How isidentifier() works?
# Python code to illustrate
# the working of isidentifier()
# String with spaces
string = "Its My Code"
print(string.isidentifier())
# A Valid identifier
string = "ItsMyCode"
print(string.isidentifier())
# Empty string
string = ""
print(string.isidentifier())
# Underscore string
string = "_"
print(string.isidentifier())
# Alphanumeric string
string = "ItsMyC0de123"
print(string.isidentifier())
# Beginning with an integer
string = "123ItsMyCode"
print(string.isidentifier())
Output
False
True
False
True
True
False
Example 1: How to use isidentifier() method?
# Python isidentifier() method example
str = "ItsMyCode"
# check if the string is valid identifier
if str.isidentifier() == True:
print("{text} is an identifier".format(text=str))
else:
print("{text} is not a valid identifier".format(text=str))
str2 = "$$ItsMyCode$$"
if str2.isidentifier() == True:
print("{text} is an identifier".format(text=str2))
else:
print("{text} is not a valid identifier".format(text=str2))
Output
ItsMyCode is an identifier
$$ItsMyCode$$ is not a valid identifier
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