Dictionaries and Sets

1. Dictionaries: Key-value pairs for storing data.

   • Example: student_grades = {'Alice': 90, 'Bob': 85}.

2. Sets: Unordered collections of unique elements.

   • Example: unique_numbers = {1, 2, 3} ensures no duplicates.

3. Advantages:

   • Dictionaries provide fast lookups using keys.
   • Sets simplify operations like union, intersection, and difference.

4. Use Cases:

   • Dictionaries: Storing student grades, configuration settings.
   • Sets: Removing duplicates, checking membership.