A Python identifier is a name used to identify a variable, function, class, module or other object.
An identifier starts
with a letter A to Z or a to z or an underscore (_) followed by zero or more
letters, underscores and digits (0 to 9).
Python does not allow
punctuation characters such as @, $, and % within identifiers.
Python is a case
sensitive programming language. Thus, Man and man are
two different identifiers in Python.
Naming conventions for
Python identifiers −
- Class names start with an uppercase
letter. All other identifiers start with a lowercase letter.
- Starting an identifier with a
single leading underscore indicates that the identifier is private.
- Starting an identifier with two
leading underscores indicates a strongly private identifier.
- If the identifier also ends with
two trailing underscores, the identifier is a language-defined special
name.