What is the difference between the remove and discard methods?

The remove and discard methods are used to delete an item from a set (a collection of unique elements) in Python. The main difference between them lies in how they handle the scenario when the item to delete is not found in the set.

The remove method is used to remove a specified item from the set. If the item is not found in the set, the method raises a KeyError exception. The syntax for using the remove method is: ``` set.remove(item) ```

The discard method is similar to the remove method, but it does not raise a KeyError exception when the item to be removed is not found in the set. Instead, it simply does nothing. The syntax for using the discard method is: ``` set.discard(item) ```

Let's consider a set `my_set = {1, 2, 3, 4}` and see how the remove and discard methods behave when trying to delete an item that exists in the set and an item that does not exist in the set. 1. Deleting an item that exists in the set: - Using the remove method: `my_set.remove(3)` will remove the item `3` from the set, resulting in `my_set = {1, 2, 4}`. - Using the discard method: `my_set.discard(3)` will also remove the item `3` from the set, resulting in `my_set = {1, 2, 4}`. 2. Deleting an item that does not exist in the set: - Using the remove method: `my_set.remove(5)` will raise a KeyError exception, since the item `5` is not found in the set. - Using the discard method: `my_set.discard(5)` will do nothing and not raise any exceptions. So the set remains unchanged, `my_set = {1, 2, 4}`. In conclusion, both remove and discard methods are used to delete items from sets. The main difference is that the remove method raises a KeyError exception if the item is not found in the set, while the discard method does not raise any exceptions and simply does nothing if the item is not found in the set.