How can I use sets in Python to remove duplicates from a list?

How can I use sets in Python to remove duplicates from a list?

You can convert a list to a set to remove duplicates, then convert it back to a list. For example:

my_list = [1, 2, 2, 3, 4, 4, 5]
unique_list = list(set(my_list))
print(unique_list)  # Output: [1, 2, 3, 4, 5]

Does this method maintain the order of elements?

No, converting a list to a set does not maintain the order. If you need to keep the order, you can use a loop:

unique_list = []
for item in my_list:
    if item not in unique_list:
        unique_list.append(item)

Are there any other ways to remove duplicates while keeping the order?

Yes, you can use a dictionary to maintain order in Python 3.7 and later:

unique_list = list(dict.fromkeys(my_list))

What if I have a list of strings instead of numbers?

The same methods apply! You can use sets or a loop to remove duplicates from a list of strings.