Keywords and Identifiers Python

In Python, keywords are reserved words that have a special meaning and cannot be used as variable names or identifiers. Here is a list of Python keywords:

and, as, assert, break, class, continue, def, del, elif, else, except, False, finally, for, from, global, if, import, in, is, lambda, None, nonlocal, not, or, pass, raise, return, True, try, while, with, yield

Identifiers, on the other hand, are names given to variables, functions, classes, modules, and other objects in Python. Identifiers are case sensitive and must follow certain rules:

• They can only contain letters (a-z, A-Z), numbers (0-9), and underscores (_).
• They cannot start with a number.
• They cannot be a Python keyword.

Here are some examples of valid and invalid identifiers:

Valid identifiers:

my_variable
myVariable
MY_VARIABLE
my_function
myClass

Invalid identifiers:

1variable (starts with a number)
my-variable (contains a hyphen)
if (a Python keyword)

It is important to choose meaningful and descriptive names for identifiers to make your code easier to read and understand.