Python Foundations

From zero to confident with Python basics

170 interactive lessons (165 core + 5 bonus mini-projects) split into 8 modules covering print/variables, types, conditions, loops, lists, dicts, functions, strings, errors, and real-world mini-projects. First 15 lessons free, no signup.

From day one

✓Variables, types, operators, conditions, loops — the literal building blocks

✓Lists, dicts, sets, tuples — when to use each and the perf tradeoffs

✓Functions, closures, decorators, generators

✓Strings, formatting, regex basics

✓Files, errors, debugging — handle real-world data

✓Comprehensions, lambda, map/filter — Pythonic idioms

✓Mini-projects every 10 lessons: calculator, todo CLI, file organizer, etc.

✓All 170 lessons (165 core + 5 bonus mini-projects) run in your browser — no install required

9 modules · 170 interactive lessons

#1Модуль 1 · Основи синтаксису

#2Модуль 2 · Структури даних

#3Модуль 3 · Функції та рядки

#4Модуль 4 · Об'єктно-орієнтоване програмування

#5Модуль 5 · Файли, помилки, стандартна бібліотека

#6Модуль 6 · Конкурентність та паралелізм

#7Модуль 7 · Просунута стандартна бібліотека

#8Модуль 8 · Сучасний Python та capstone

#9Модуль 9 · Бонус: міні-проєкти

See all 170 lessons →

Day 1 vs Day 60

The same hands. Two months apart. This is what 170 interactive Foundations lessons buy you.

📅 DAY 1 · LESSON 1Hello World

# First line of Python you ever write
print("Hello, World!")

🚀 DAY 60 · CAPSTONEWeather CLI · 38 lines

from dataclasses import dataclass
from typing import Iterable
import json, sys, urllib.request

@dataclass
class Forecast:
    city: str
    temp_c: float
    condition: str

    @classmethod
    def from_api(cls, payload: dict) -> "Forecast":
        return cls(
            city=payload["name"],
            temp_c=payload["main"]["temp"] - 273.15,
            condition=payload["weather"][0]["description"],
        )

def fetch(city: str, key: str) -> Forecast:
    url = (
        "https://api.openweathermap.org/data/2.5/weather"
        f"?q={city}&appid={key}"
    )
    with urllib.request.urlopen(url, timeout=5) as r:
        return Forecast.from_api(json.load(r))

def report(cities: Iterable[str], key: str) -> None:
    for c in cities:
        f = fetch(c, key)
        print(f"{f.city:15} {f.temp_c:5.1f}°C  {f.condition}")

if __name__ == "__main__":
    report(sys.argv[1:], key="<your-key>")

Dataclasses, type hints, HTTP, JSON parsing, CLI args — all introduced one concept at a time across modules 1 through 10. Nothing skipped, nothing magic.

Three real projects, not toy exercises

Capstone missions ship working programs you can show. Each one introduces a concept set deeply enough to put on a resume bullet.

~/inventory

$ python inv.py add "USB-C cable" --qty 12
✓ added (id 3, qty 12)

$ python inv.py list --low-stock
id  item              qty
─── ───────────────── ───
1   Notebook          2  ⚠
2   Pen 0.5mm         4  ⚠

$ python inv.py export --to csv
✓ wrote inventory.csv (38 rows)

CLI Inventory Manager

argparse, dataclasses, CSV I/O, error handling. ~modules 6–10.

currency.py● running

>>> convert(100, "USD", "UAH")
4012.0   # via openexchangerates.org

>>> convert(50, "EUR", "GBP")
42.18

>>> rates(["EUR","GBP","JPY"])
{
  "EUR": 0.92,
  "GBP": 0.78,
  "JPY": 156.4
}

Currency Converter API

HTTP requests, JSON parsing, caching, type hints. ~modules 8–11.

md2html.py92 lines · 100% test coverage

# Recipes

**Quick** pasta in
*10 minutes*.

- olive oil
- garlic
- pepper

Recipes

Quick pasta in 10 minutes.

olive oil
garlic
pepper

Markdown → HTML Converter

Regex, classes, recursion, unit tests with pytest. ~modules 10–13.

Frequently asked

Do I need to install Python to do this track?

No. Python runs in your browser via Skulpt — open lesson 1 and you're already coding. Works on a phone too.

How long does the Foundations track take?

170 lessons (165 core + 5 bonus mini-projects), average ~10 minutes each. At 5 lessons a day that's about 5 weeks; most learners finish in 4-8 weeks depending on pace.

What if I've programmed in another language before?

Skim the first 30 lessons (syntax + basic types) and jump in at module 3. The platform tracks your progress regardless of where you start.

Is the Foundations track enough to get a junior dev job?

Foundations alone teaches the Python part. Pair it with FastAPI or Data Science track + 1 portfolio project + interview prep to be job-ready.

How much of Foundations is free?

First 15 lessons no signup, no card. After that a 7-day full-library trial — see /pricing.