PYTHON CORE · LESSON 45

The key may not be.

Method get in the dictionary · about 10 minutes

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STEP 1

Careful search

The square brackets give an error if there is no key. get allows you to call a backup response.

book = {"title": "Космос"}
print(book.get("pages", 0))

Dictionary search

Key keypagesDictionaryno keyReserve.0

✦ There is no pages key, so 0 will appear.

STEP 2

If the key is found, get will return the real value. You won't need a backup.

book = {"pages": 20}
print(book.get("pages", 0))

✦ Now there will be 20.

IN-CLASS PRACTICE

Reprint the spare value example.

game = {"score": 3}
print(game.get("lives", 0))

HOMEWORK

Create book with a title key and a «Космос» value. Using get, output the value of the pages key, and if not, 0.

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