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Python String isidentifier() Method

  • Last Updated : 12 Aug, 2021

Python String isidentifier() method is used to check whether a string is a valid identifier or not. The method returns True if the string is a valid identifier else returns False. 

Syntax: 

string.isidentifier()

Parameters:

The method does not take any parameters



Return Value: 

The method can return one of the two values: 

  • True: When the string is a valid identifier.
  • False: When the string is not a valid identifier.

Example: How isidentifier() works

Python3




# Python code to illustrate 
# the working of isidentifier()
  
# String with spaces
string = "Geeks for Geeks"
print(string.isidentifier())
  
# A Perfect identifier
string = "GeeksforGeeks"
print(string.isidentifier())
  
# Empty string
string = ""
print(string.isidentifier())
  
# Alphanumerical string
string = "Geeks0for0Geeks"
print(string.isidentifier())
  
# Beginning with an integer
string = "54Geeks0for0Geeks"
print(string.isidentifier())

Output: 

False
True
False
True
False

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