🏷️ DAY 5: Dictionaries

Welcome back, Pythonistas! 🚀 For the last two days, we’ve been using indices like 0, 1, and 2 to grab items out of our lists and tuples. But let’s be real—if you’re building an RPG game and want to find a character's "stamina", nobody wants to guess whether that's stored at index 4 or index 7.

Today, we are throwing numerical indices out the window and upgrading to custom labels. Imagine a massive chest of drawers where you get to write the labels on the outside yourself.

Enter Dictionaries! 🏷️📖

📖 What is a Dictionary?

In Python, a Dictionary is a collection of key-value pairs. Instead of looking up items by a number, you look them up using a unique word (the Key) to get the data attached to it (the Value).

To make a dictionary, we use curly braces {}, and we separate keys and values with a colon :

# Creating our character's stat sheet 🎮
character = {
    "name": "Anya",
    "role": "Mage",
    "level": 14,
    "is_premium": True
}

print(character)

🔍 Reading data with Custom Labels

To pull data out, you use the exact same square bracket setup we used for lists, but instead of a number, you pass in the exact string key:

# Checking Anya's role
print(character["role"])  # Prints: Mage

# Checking Anya's level
print(character["level"])  # Prints: 14

⚠️ Tantrum Alert: Python keys are case-sensitive! If you try to look up character["Role"] with a capital R, Python will throw a KeyError and pretend it has never seen that data in its life.

🛠️ Modifying the Chest of Drawers

Dictionaries are completely mutable (flexible). You can change values, add new drawers, or rip drawers out completely.

# 1. Updating a value (Anya leveled up! 🎉)
character["level"] = 15

# 2. Adding a brand new key-value pair
character["weapon"] = "Crystal Staff"

# 3. Deleting a key-value pair 🗑️
del character["is_premium"]

print(character)
# Output: {'name': 'Anya', 'role': 'Mage', 'level': 15, 'weapon': 'Crystal Staff'}

🚀 Today's Challenge 🏆
Create a dictionary called my_car with the keys: brand, model, and year.

Print out the model of your car.

Update the year to a newer one (or change it to a hovercar from the future 🚀).

Add a new key called color and give it a value.

Drop your custom dictionary in the comments below! Tomorrow, we are finishing our core data structures by looking at Sets—the ultimate bouncers of the Python world! 🎟️