🧙‍♂️ Python Wizard!

🔍 Quick Lesson

A dictionary in Python is like a magic spellbook – each spell (key) has a matching incantation (value). Dictionaries let you store data in key-value pairs, making data easy to look up.

1. Creating a Dictionary

                    wizard = {
                        "name": "Gandalf",
                        "age": 2019,
                        "magic_type": "White"
                    }
                

Here, "name", "age", and "magic_type" are keys, and their associated values are "Gandalf", 2019, and "White".

2. Accessing Values

print(wizard["name"])

This will output Gandalf. You can access values using the key inside square brackets.

3. Adding & Modifying Values

                    wizard["staff"] = "Oakwood"
                    wizard["age"] = 2020
                

You can add new key-value pairs or update existing ones just by assignment.

4. Removing Items

del wizard["magic_type"]

This will remove the key "magic_type" from the dictionary.

5. Useful Dictionary Methods

• dict.keys() – Returns all keys
• dict.values() – Returns all values
• dict.items() – Returns all key-value pairs
• dict.get(key) – Safely get a value without error if the key doesn’t exist

print(wizard.get("robe", "Not found"))

This prints "Not found" if "robe" isn't in the dictionary.

6. Looping Through Dictionaries

                    for key, value in wizard.items():
                        print(f"{key}: {value}")
                

This loops through all key-value pairs in the dictionary.