What is Identifier in Python?

In Python, an identifier is the name relegated to a variable, capability, class, or other item. It is a method for giving the object a name that can be read by humans and is used in the program to refer to it. In Python, an identifier should adhere to specific guidelines to be legitimate.

In Python, the first character of an identifier must by default be a letter or an underscore (). A special character or a number cannot begin the identifier. The identifier's remaining characters can be underscores, numbers, or letters. This implies that an identifier can contain letters, numbers, and highlights yet can't contain some other unique characters.

In Python, the second requirement for an identifier is that it must be unique within the context of its use. This means that you can't have two functions in the same module or two variables with the same name in the same scope. Endeavoring to do so will bring about a Name Mistake.

The third rule for an identifier in Python is that it can't be a saved word. The reserved words in Python can't be used as identifiers. Keywords like "if," "other," "for," and "while" are examples of these. If you attempt to use a reserved term as an identifier, a syntax error will be returned.

In order to make the code easier to read and maintain, Python programmers use the idea of naming conventions for identifiers.

"CamelCase," which is used for variables and functions, is one of the most widely used naming conventions. In CamelCase, the first letter of each word is capitalized, but the first letter of the identifier is lowercase. For instance, "myVariable" and "myFunction" are substantial CamelCase identifiers.

Another popular naming convention is "snake_case," which is used for variables and functions. Underscoring separates words in snake case, which uses lowercase letters for all identifier letters. For example, "my_variable" and "my_function" are valid snake_case identifiers.

Furthermore, the inherent Python capability id() recovers an article's unmistakable ID. The object for which you want to obtain the identifier is the only argument that the id() function accepts. The identifier that returns is an original integer associated with the item. This identifier will continuously be particular and consistent as long as necessary.

Identifiers are a significant piece of Python programming, and they are utilized to give a comprehensible name to a variable, capability, class, or some other item in Python. Starting with a letter or underscore, being unique within the scope, and not being a reserved word are all requirements for an identifier. Also, Python designers follow naming shows like CamelCase and snake_case to make the code more lucid and viable. The unique identifier of an object can be obtained using the built-in id() function.

Here is an example of a program that demonstrates the use of identifiers in Python:

When you run the program, it will output the following:

Output

140735299946512
140735299946576
140735299946384

In this program, we have a variable called myVariable, a function called my_function, and a class called MyClass. The variable and function use different naming conventions (CamelCase and snake_case, respectively) commonly used in Python. We also create an object of the MyClass class and assign it to the variable my_object.

The id() function is used to obtain each object's unique identifier at the program's conclusion. The id() capability accepts an item as a contention and returns its one of a kind identifier as a number.

The variable, function, and object's unique identifiers will be displayed on the screen when this program is run. The program can use these unique and constant identifiers to refer to the objects throughout their lifetime.

It is vital to take note of that you ought to try not to utilize any Python-held words as an identifier in your program, or it will raise a SyntaxError.