Rules to define Python Identifiers

1)An identifier in Python must start with a letter a to z or A to Z or an underscore (_) succeeded by zero or more letters, digits (0 to 9), and underscores.

2)Special characters are not allowed in identifiers.

3)An identifier should not be a reserved keyword of Python.

4)Python is a case-sensitive programming language.

5)In Python Class names must start with an uppercase letter For example class Student. All identifiers start with a lowercase letter in Python.

6)A private identifier in python starts with a single leading underscore (_name).

7)A strongly private identifier in python starts with two leading underscores (__name) defined.

8)The identifier is a language-defined special name, If the identifier starts and ends with two underscores (__name__).