In this tutorial, we’ll learn what Python string isidentifier() method is and how to properly use it. We’ll go through multiple Python code examples to understand how isidentifier() method works.
Introduction: Python String isidentifier() Method
This method will return True if a specified string is a valid Python identifier, or else it will return False.
Syntax of isidentifier() Method
string.isidentifier()
- Python string isidentifier() method does not take any arguments.
- This method returns True if the string is a valid Python identifier and will return False if its not.
Example 1: isidentifier() Method applied on a String
strVal='Pyhton'
print(strVal.isidentifier())
print('_Python'.isidentifier())Output
True True
The specified string is a valid identifier so Python string isidentifier method return True.
Below examples include some non-valid identifiers.
print('2Python'.isidentifier())
print('Pyth on'.isidentifier())
print('&Python'.isidentifier())
print('$Python'.isidentifier())
print('2.5Python'.isidentifier())
print('python2@&$'.isidentifier())Output
False False False False False False
Example 2: isidentifier() used in If Else Condition inside Python For Loop
listStr=['Programming','2Python','Pyth on','_Python','&Python','$Python','python$']
for i in listStr:
if i.isidentifier()==True:
print(i+' is a valid identifier')
else:
print(i+' is not a valid identifier')Output
Programming is a valid identifier 2Python is not a valid identifier Pyth on is not a valid identifier _Python is a valid identifier &Python is not a valid identifier $Python is not a valid identifier python$ is not a valid identifier
Example 3: isidentifier() Method Return Value
val='PythonProgram3' returnedVal=val.isidentifier() print(returnedVal)
Output
True
Python string isidentifier method return True as the string is a valid identifier.
Conclusion
To conclude this tutorial, hope you now have an in-depth practical knowledge of how to properly use Python string isidentifier method. I’ll be looking forward to receive your valuable feedback on this post. Thank you for reading it.
