Python Identifiers

Identifiers are used to identify variables, functions, classes, or other objects.  Some rules should be taken care of before naming the objects. These are:

• The identifiers should start with A-Z or a-z or underscore (_) followed by letters or digits.
• No other special character (e.g @, $, and %) is allowed.
• As python is a case-sensitive language, Var and var are two different identifiers.
• Class name should start with Uppercase.
• Except class name, all other identifiers are advised to be in lowercase.
• If the identifier starts with a single leading underscore, the identifier is considered to be private.
• If the identifier starts with two leading underscores, the identifier is considered to be strongly private.
• If the identifier ends with two trailing underscore, the identifier is considered to be a language-defined special name.