Name each value.
Use a key to find it.

Dictionaries organize related data by meaningful keys instead of numeric positions.

01 Learn02 Try03 Predict

01 Learn

A dictionary stores unique keys and their values.

Dictionaries organize related data by meaningful keys instead of numeric positions.

student = {"name": "Ana", "age": 22}
print(student["name"])

Square brackets use a key to access its associated value.

Try changing one value, then explain which part of the collection changed and why.

↳

Keep this in mind: Read the collection operation before predicting the result.

Try it

student = {"name": "Ana", "age": 22, "course": "Python"}

print(student["name"])
student["age"] = 23
student["city"] = "Novi Sad"
print(student["age"])
print(student.get("city"))

Run the example, then change one value and observe the result.

02 Try

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03 Predict

What will this program print?

Read each operation before choosing an answer.

product = {"name": "Keyboard", "price": 2500}

product["price"] = 2200
product["stock"] = 5

print(product["price"])
print(len(product))

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04 Understanding Check

What will this program print, and why? Explain updating, adding a key, and membership.

user = {"name": "Ana", "points": 10}

user["points"] += 5
user["level"] = "beginner"

print(user["points"])
print("level" in user)
print(len(user))