🎯 What you will learn
- Create dictionaries with { }
- Look up values by key
- Add, change and loop through items
👋 Let’s get started!
A real dictionary matches words to meanings. A Python dictionary matches KEYS to VALUES — like a character card: name → “Zara”, health → 100. 📒
🪜 Step by step
1. 📒 Make one
Use curly brackets with key: value pairs.
hero = {"name": "Zara", "health": 100, "power": "flight"}
print(hero["name"])2. ✏️ Change & add
Assign to a key to change or add it.
hero["health"] = 80
hero["level"] = 2
print(hero)3. 🔁 Loop through
items() gives you each key and value.
for key, value in hero.items():
print(key, "→", value)🧪 Try it!
Change the code and press ▶ Run to see what happens. You can’t break anything!
Pet shop prices
prices = {"goldfish": 5, "hamster": 15, "parrot": 60}
for pet, cost in prices.items():
print(pet, "costs $" + str(cost))
print("Total for all:", sum(prices.values()))Update a score board
board = {"Ana": 3, "Ben": 5}
board["Ana"] = board["Ana"] + 4
print(board["Ana"])📖 Key words
Tap a card to flip it over!
- Dictionary
- Key–value pairs in { } 📒
- Key
- The label you look up 🔑
- Value
- The information stored 🎁
🏆 Challenge
Look up and print the capital of Japan.
Challenge
capitals = {"France": "Paris", "Japan": "Tokyo", "Kenya": "Nairobi"}
Knowledge Check Quiz
- What prints?
- What brackets make a dictionary?
- What do you use to look something up?