Python Identifires

 Python Identifiers

Python identifier is a name used to identify a variable,function,class,module or other objects.

There are some rules/conventions about naming identifiers.

• An identifier can start with the letter “A-Z” or “a-z”. 
• An identifier can start with the “_”followed by any digit or letter. 
• An identifier can start with the any letter followed by any digit. 
• An identifier can’t start with a digit 
• An identifier can’t use functional characters such as @,%,!

Note: Python is case sensitive language. So “name” and “Name” are 2 different identifiers.

Some conventions about naming identifiers.

• Class names start with uppercase letters and all other identifiers with a lowercase letter     Ex: Student stu1=new Student( )                                                                                                             Shape s1=new Shape( )
• Starting an identifier with single leading underscore indicate by convention that the identifier is need to be private                                                                                            Ex: _accountno
• Starting an identifier with 2 leading underscores indicate a strongly private identifire Ex:_ _password      _ _pinnumber