Python 3: Programming in Python for Beginners

About Python 3: Programming in Python for Beginners

What will you know after this course?

What is Python? Installation and first execution

Variables, creating and running external srcript, interactive Shell

Comments

Types of Variables

Math Operators

Exercise: adding VAT to products

Semicolon and ENTER - assigning multiple values to variables at once

Assignment operators

Playing with Strings (Slicing, adding and having fun)

Importing libraries - basics

ATTENTION - important lecture about common mistake regarding functions

Taking data from user and type conversion (casting)

Comparison (Relational) Operators

Instruction 'if' why INDENTATION is IMPORTANT in Python | DO NOT SKIP!

Calculator Exercise

Values different than zero

Logical Operators

Loop while

EXERCSE: Summing numbers

Loop for

Break and continue

EXERCISE: Guess Number

What are Lists? Basic operations on lists

Checking if element is 'in' or 'not in' the list

Operating on lists with Functions

Tuples - what does immutable mean?

Dictionary

Sets

Operations on sets

Nested types

Processing nested types using loops

Dictionary inside Dictionary, Dictionary inside List - when to choose which?

Extracting records from nested dictionaries

EXERCISE: Dynamic dictionary with definitions

List comprehensions

Python generator expressions

Dictionary comprehensions

Set comprehension

EXERCISE: Finding numbers that are divisible by 7, but are not divisible by 5

How to create a function? What problem functions solve?

Passing more than one argument, function with multiple parameters

Returning values 'return'

Your own modules imported

enum - what it is and why you should use it?

EXERCISE: Arithmetic sequence, summing numbers up to entered number

Measuring PERFORMANCE of code | How well (fast) some part of code work

Function as argument of another function | How to measure performance of func

Default arguments

Keyword and positional arguments

EXERCISE - checking if value is in container

Variable length argument

Local vs Global Variables - scope - lifetime of variables

Immutable vs mutable objects

Shallow vs Deep copy of object

Lambda | Anonymous functions - what are they? when should you use them?

Drawing random numbers - creating a program that checks if you hit the monster

Random events - choice vs choices function

shuffle - shuffling cards in 'war' game

EXERCISE: Drawing elements without REPETITION - lottery game - 6 numbers from 49

EXERCISE | GAME - Drawing random chests colours with random rewards

EXERCISE | GAME - drawing approximate values to a certain value

What is a file? How to create it? Why do we need to CLOSE it? How to save data?

Exceptions, try, finally block on practical example

Opening the file using: with... as...:

Reading the content of file - read vs readlines, splitting lines, encoding

seek and tell - changing and reading the position of last operation in file

append - adding text at the end of file

a+, r+, w+ - two function file opening modes

Keyword except - catching exceptions - EXERCISE - loading names and surnames

Generator functions - yield keyword

EXERCISE: Generate infinite amount of numbers multiplied by themselves

Send method in generator functions

What is JSON? Why do we use it? What problems does JSON solve?

Creating and saving data from Python in JSON format to file and String

Pretty Printer - loading/saving pretty and sorted JSON

Loading data from JSON file to Python

What is pip and PyPi? Installing and playing with external package - request

Loading data from server from JSON file - preface to next EXERCISE

Processing JSON data | extracting top values from list of dictionaries

Refactoring - making our code easier to maintain from previous lecture

SOLUTION 1: Retrieving a few users from server at the same time

SOLUTION 2: Retrieving a few users from server at the same time

SOLUTION 3: Retrieving a few users from server at the same time

defaultdict supplying missing values of dictionary when accessing empty element

What is public API? Where to find them? stackoverflow API

Getting JSON from stackoverflow.com -> getting top questions from last week

Opening websites from Python code - webbrowser module

Getting records from last week - datetime module

EXERCISE: CAT system - introduction

POST - adding a cat to favourite list

DELETE - removing a cat from favourite list

VSC - downloading and installing

Setting up the workspace in VSC and installing basic extensions

Linter - what is linting - how to use it, settings in .vscode

Code Runner | Custom Shortcuts | Shortcuts from other editors, Interactive shell

Icons theme

Bracket Pair Colorizer - improving readability of your code

Python Preview - watching the code execution while writing it

Python Quick Print

Code Spell Checker

Auto Save - making sure your file is saved after each change

Snippets and pass keyword

Automatic code formatting

Debugging mode - how to professionally debug your code?

Ligatures - custom font created especially for programmers - Fira Code

What is Object Oriented Programming?

What are objects and classes? How to create a simple object and class?

Creating your first method - what is "self"?

__init__ - sending arguments to class for initialization

EXERCISE: Create rockets that can move up

Document String - docstring

__str__ - dunder method representing text of object

EXERCISE: Organizing more than one class - Rocket Board

__getitem__, __setitem__ - setting and getting values using dunder methods

EXERCISE: Counting distance between rockets

Is it important to understand math that was used in the last lecture?

Static Methods

Setting type for variables using annotations - Pyright extension

__len__

class / static variables - creating USER with unique ids

EXERCISE: Bank Account - withdraw/deposit money

How to properly handle returned values from methods?

Inheritance and method overriding - super()

EXERCISE: Inheritance on practical example - result

EXERCISE: playing with cube, square and rectangle

Inheritance vs association - when to use which?