Python 3 For Beginners in 2020!

Explore variables and operations in Python by performing arithmetic on numbers and concatenating strings, then diagnose type errors when mixing strings and integers and learn printing results.

Create a calculator by prompting for two numbers, convert inputs to integers, perform add, subtract, multiply, divide, and modulo, and display a formatted result like 5 + 8 = 13.

Practice implementing conditional logic in Python by building a number sign tester that reads input, converts it to an integer, and prints whether it is negative, zero, or positive.

Explore how Python lists store multiple values, access elements by index (0, 1, 2), and update items like replacing Google with Microsoft, while noting index out of range errors.

Discover how tuples in Python are like lists but immutable, with fixed elements you cannot reassign. Create with parentheses, access by index, duplicate values allowed, and compare to lists.

Explore sets in Python, an unordered collection of unique elements. Learn to add with add or update, check size with len, and remove with remove or discard.

Understand how the while loop differs from the for loop: it iterates while a condition is true, updating i each cycle and stopping when the condition fails.

Learn to delete files and directories in Python by importing the os module, checking with os.path.exists, and removing with os.remove, with user feedback when a file does not exist.

Define a function that returns a value and call it to see outputs like 10 and 50 when x is 5, and return 0 or 1 when x is zero.

Learn recursion with a factorial example in Python, using a base case of n equals 1 and a recursive call to compute n times factorial(n-1) step by step.

Discover how to use modules as libraries in Python by importing files, aliasing with as, and calling functions like factorial, and use the platform module to identify your operating system.

Explore object oriented programming in Python, focusing on class-based systems where objects are instances with attributes and methods.

Learn how constructors initialize new class instances with default or provided x and y values, and how to delete an object's property and inspect its type.

Discover how inheritance links classes, with a parent supplying attributes and methods to children under the is-a rule, and how methods resolve up the class chain.

Explains the privacy of attributes and methods in Python by defining private and protected attributes, showing how to use getters and setters, and illustrating access restrictions across modules.