What are the differences between dictionaries and sets in Python?

What are the main differences between dictionaries and sets in Python?

Dictionaries are key-value pairs, while sets are collections of unique elements without any specific order.

Can you give me an example of how to create a dictionary and a set?

Sure! A dictionary can be created like this: my_dict = {'a': 1, 'b': 2}. A set can be created like this: my_set = {1, 2, 3}.

Are there any performance differences when using dictionaries and sets?

Yes, dictionaries have O(1) average time complexity for lookups, while sets also have O(1) for membership tests.

When should I use a dictionary instead of a set?

Use a dictionary when you need to associate values with keys. Use a set when you only need to store unique items.