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🐍 Python Foundations

From your first print to functions — run every exercise in your browser.

1
Lesson 1 — Hello, Python
basics · 5 min
→2
Lesson 2 — Variables
basics · 6 min
→3
Lesson 3 — f-strings
basics · 6 min
→4
Lesson 4 — if / else
easy · 8 min
→5
Lesson 5 — Loops
medium · 8 min
→6
Lesson 6 — Lists
medium · 9 min
→7
Lesson 7 — Functions
medium · 10 min
→8
Lesson 8 — Dictionaries
medium · 9 min
→9
Lesson 9 — String toolkit
medium · 8 min
→10
Lesson 10 — Dictionary methods
medium · 8 min
→11
Lesson 11 — Tuples & unpacking
medium · 7 min
→12
Lesson 12 — Sets
medium · 8 min
→13
Lesson 13 — enumerate & zip
medium · 8 min
→14
Lesson 14 — Ternary expressions
medium · 7 min
→15
Lesson 15 — Unpacking tricks
medium · 8 min
→16
Lesson 16 — Putting it together
hard · 12 min
→17
Lesson 17 — List comprehensions
hard · 10 min
→18
Lesson 18 — Errors: try / except
hard · 10 min
→19
Lesson 19 — Recursion
hard · 11 min
→20
Lesson 20 — Mini project: word counter
hard · 12 min
→21
Lesson 21 — Nested comprehensions
hard · 11 min
→22
Lesson 22 — Custom exceptions
hard · 11 min
→23
Lesson 23 — Memoization by hand
hard · 12 min
→24
Lesson 24 — Mini project: word frequency (expert)
hard · 13 min
→25
Lesson 25 — Decorators with arguments
very hard · 14 min
→26
Lesson 26 — Context managers
very hard · 15 min
→27
Lesson 27 — Ultimate: RPN calculator
★ ultimate · 18 min
→