Collections

Lists are ordered sequences. Dicts map keys to values. Both are delightfully flexible and occasionally too flexible.

fruits = ["apple", "banana"]
prices = {"apple": 3}
print(fruits[::-1])  # reverse — Pythonic magic

Quirk #5 — Slicing: lst[start:stop:step] is one of Python's superpowers. [::-1] reverses a list. [:] makes a shallow copy (usually).

Try it

• fruits.append("durian") — the world's most opinionated fruit.
• Sum all prices with a loop or sum(prices.values()).