Dictionaries are unordered collections of key-value pairs. They are mutable.

• Creating: my_dict = {"name": "Alice", "age": 30, "city": "New York"} or my_dict = dict(name="Alice", age=30)
• Accessing: Use keys. my_dict["age"] is 30.
• Modifying/Adding: my_dict["age"] = 31, my_dict["country"] = "USA"
• Common Methods: keys(), values(), items(), get(key, default_value_optional), pop(key). Keys must be unique and immutable (e.g., strings, numbers, tuples).