Python Basics
Syntax, built-ins and idioms — Python that types itself.
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Peek inside — 3 of 342 cards
'hello'[::-1]
'olleh' — slice with step −1 reverses
Squares of 0–4 as a list comprehension?
[x*x for x in range(5)]
len({'a': 1, 'b': 2})
2 — dict length counts keys
About this deck
The Python you reach for daily: core syntax, the built-ins worth knowing by heart, list comprehensions, slicing, f-strings and the standard-library one-liners that replace ten lines of loop.
Every card is runnable — a prompt on the front, real output on the back — so your mental interpreter gets trained, not just your vocabulary.
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