Lesson 10 — Dictionary methods

Read dicts safely

Reading d["key"] crashes with a KeyError when the key is missing. get() returns None instead, or a default you choose: d.get("x", 0). To walk through a dict, items() gives you each key together with its value, so one loop sees both.

prices = {"tea": 3, "cake": 5}
for item, price in prices.items():
    print(item, price)

Why it matters: real data often has missing fields, and looping over pairs is how you print reports or totals from a dict.