What are keywords in Python?

Posted on January 18, 2022  •  3 minutes  • 480 words

Hello everyone, here is the article offering the python reserved keywords and some common python data types and how to find data type.

Python has a set of keywords that are reserved words that cannot be used as variable names, function names, or any other identifiers.

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

Python Data Types

A data type is a category for values, and every value belongs to exactly one data type.

Common Data Types:

Python has the following built-in data types by default, in these categories :

• Text Type : str
• Numeric Types : int, float, complex
• Sequence Types : list, tuple, range
• Set Types : set, frozenset
• Mapping Type : dict
• Boolean Type : bool
• Binary Types : bytes, bytearray, memoryview

Getting the Datatype

Datatype of any object can be printed by using the type() function.

For Example : Find the datatype using ‘type()’

>>> x = 5
>>> type(x)  # to check the data type of x.
<class 'int'> # Output
>>>
>>> st = "Hello"
>>> type(st)  # to check the data type of st.
<class 'str'>   # Output
>>>
>>> y = 5.5
>>> type(y)  # to check the data type of y.
<class 'float'>  # Output 
>>>