Variables

Variables Declaration and Reassignment Input and Output Variables Local and Global Variables Operations on Variables “Type” of a Python Variable Type Casting Variables Constants Hands On Exercise

Data Types

Python Data Types Primitive Data Types Compound Data Types Lists, Tuples, Dictionaries, and Sets Hands On Exercise

Comments

Python Comments Single-Line Comments Inline Comments Commenting Code Multiline Comments Hands On Exercise

Booleans

Python Booleans The bool() Method Evaluating Expressions Sub-Type of Int Hands On Exercise

Operators

Python Operators Arithmetic Operators Assignment Operators Comparison Operators Logical Operators Identity Operators Membership Operators Bitwise Operators Operator Precedence and Associativity Hands On Exercise

Input / Output

Python Input Python Output Hands On Exercise

Lists

Accessing Lists

Adding to Lists

Modifying Lists

Deleting from Lists

List Comprehension

Hands On Exercise

Creating Lists

We'll cover the following

List literals
- Syntax
List constructor
List comprehension

Python offers a variety of ways for us to create lists, such as list literals, list constructors, and list comprehensions.

List literals

A list literal is the simplest way to create a list. We just need to add comma-separated values enclosed in square brackets [].

Syntax

[element1, element2, … ]

my_list = [1, 5, 10, 15, 20]
print(my_list)
print([True, False, False, "1"])

List constructor

A list constructor involves the use of the class constructor list() to create a list object. To create a list using this method, the values to be included in the list are passed in the constructor, which is enclosed by square brackets [].

The following code uses the constructor to create a list containing three strings, “Lists”, “are” and “useful”, respectively.

my_list = list(["Lists", "are", "useful!"])
print(my_list)

Note: If list() is called without any parameters, an empty list will be returned.

List comprehension

List comprehensions are one of the most interesting things we can do with a list! The section on list comprehensions gives a detailed guide on how to use them.

The following code creates my_list and initializes the list with the numbers from 1 to 5 (i.e. 1, 2, 3, 4, and 5).

my_list = [num for num in range (1,6)]
print(my_list)