PYTHON CORE · LESSON 29

Just different things.

A set of set · about 11 minutes

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STEP 1

Repeats disappear

The set only holds different meanings. Figure brackets here without pairs «ключ: значение».

nums = {1, 1, 2}
print(len(nums))

✦ Two different numbers.

STEP 2

The word in checks whether the value is inside the set.

colors = {"синий", "зелёный"}
print("синий" in colors)

✦ Answer True.

IN-CLASS PRACTICE

Reprint a set and count different meanings.

nums = {2, 2, 3}
print(len(nums))

HOMEWORK

Create a set of nums from 1, 1, 2, 3. Infer the number of different numbers using len.

The answer is hidden. Use similar examples from the lesson notes.