What are keywords and identifiers in Python? | Python Basics

What are keywords and identifiers in Python?

    Keywords in Python are basically a reserved word which can’t be used as a variable name, function name or any other identifier. These keywords have a specific purpose in Python and should be used in the way they are intended to. The list of few keywords along with their usages are:

Keyword	Description
and	A logical operator
as	To create an alias
assert	For debugging
break	To break out of a loop
class	To define a class
continue	To continue to the next iteration of a loop
def	To define a function
del	To delete an object
elif	Used in conditional statements, same as else if
else	Used in conditional statements
except	Used with exceptions, what to do when an exception occurs
False	Boolean value, result of comparison operations
finally	Used with exceptions, a block of code that will be executed no matter if there is an exception or not
for	To create a for loop
from	To import specific parts of a module
global	To declare a global variable
if	To make a conditional statement
import	To import a module
in	To check if a value is present in a list, tuple, etc.
is	To test if two variables are equal
lambda	To create an anonymous function
None	Represents a null value
nonlocal	To declare a non-local variable
not	A logical operator
or	A logical operator
pass	A null statement, a statement that will do nothing
raise	To raise an exception
return	To exit a function and return a value
True	Boolean value, result of comparison operations
try	To make a try...except statement
while	To create a while loop
with	Used to simplify exception handling
yield	To end a function, returns a generator

You can find the list of keywords of Python by (see the video below):

    All the keywords except True, False and None are in lowercase and they must be written as they are.

    Identifiers are words that we use to specify or declare variables. Any word that we use as a variable name is called an identifiers. It is important to note that, the identifiers are case sensitive. For example, variable differs from Variable. An identifier usually starts with a letter i.e. from A to Z or from a to z or an underscore (_) followed by letters (alphabets), underscores and digits (0 - 9).