The Python language has many similarities to Perl, C, and Java. However, there are some definite differences between the languages.
First Python Program
A Python identifier is a name used to identify a variable, function, class, module or other objects. 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, Machine and machine are two different identifiers in Python.
Here are 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.