Python lessons: learn from scratch

There are two parts: question-and-answer pages and a sequence of lesson chapters. All of it is written by Nibras Code and available in 5 languages.

Questions and answers

How do I start with Python? Install and first programInstalling Python, checking it in the terminal and the first print program.
Variables and data types in PythonWhat a variable is, and what int, str, list and dict are for.
if, for and while in Python: conditions and loopsMaking decisions with conditions and repeating work with loops.
Python functions: def, parameters and returnHow to write and call a function.
Python errors: what IndentationError, NameError and TypeError meanReading and fixing the most common errors.
Where to start with Python? How long it takes and Python vs JavaScriptA plan for beginners, project ideas and choosing a language.

First steps: your first Python programRun Hello World in the interpreter and from a file.
Basics: literals, variables, stringsComments, numbers, strings, variables and program structure.
Operators and expressionsArithmetic, comparison and logical operators, and precedence.
Control flow: if, while, forConditions and loops, break and continue.
FunctionsDefining functions, parameters, local variables, return and docstrings.
Modulesimport, writing your own module, packages and pip.
Data structures: list, tuple, dict, setLists, tuples, dictionaries, sets and sequences.
Problem solving: a word counterTurn a real problem into a program, step by step.
Object-oriented programmingClasses, objects, methods, __init__ and inheritance.
Input and output: input, files, JSONRead user input, write to a file and read from it.
Exceptions: try, except, finallyCatching errors, raise and the with statement.
The standard librarysys, os, pathlib, datetime, random and logging.