Python string isidentifier() is an inbuilt string function method as it tells if the given string is an identifier or not. The method returns true if the mentioned string is a valid identifier and false in all other cases. A valid identifier can be defined as a string that only contains alphabets, numbers or underscores. The main point regarding a valid identifier is that it cannot start with a number and it must not have space between them.

Python String isidentifier()

Python isidentifier() function returns True if the string is a valid identifier, otherwise False. The string is considered a valid identifier if it only contains the alphanumeric letters (a-z) and (0-9), or underscores (_). The valid identifier cannot start with a number, or contain any spaces.

Syntax

string.isidentifer()  

Here the variable string is the given string which will be checked if it is a valid identifier or not.

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