what is identifier ? Variables naming rules | Python Programming for Absolute Beginners in Hindi #0

in this tutorial we will learn about identifiers in python programming language , naming rules and its best practices 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, Manpower and manpower 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. Python Valid Identifiers Example abc123 abc_de _abc ABC abc Python Invalid Identifiers Example 123abc abc@ 123 for Python Identifier Naming Best Practices:- Only class names are started with capital letters (Student, Employee). Multiple words in a variable are separated by an underscore (is_valid()). If an identifier begins with an underscore, it means it is a private identifier. This does not make the variable private. It is only for the ease of the programmer to easily distinguish between private variables and public variables. Python built-in magic methods use double underscores around the names (__len__). Therefore, double underscores are used only when you are dealing with mangling in Python. Using longer name than one character is always preferred (index = 1 is better than i = 1). Camel case are used while naming the variables (studentAddress, studentId). Camel case use a capital letter to begin the second word in a compound name or phrase, when it is not separated from the first word by a space. LinkedIn: https://www.linkedin.com/in/engr-taju.. . Github: https://github.com/usta-cyber Email: engr.tajummalhussain@gmail.com #identifiers #python #naming rules #pythonbeginners #python_best_practices

Видео what is identifier ? Variables naming rules | Python Programming for Absolute Beginners in Hindi #0 автора Питоновый космос