How to use a set

A set in Python is a collection that manages data similar to keys in dictionaries but without values.

To create a set:

new_set = set()

A set can have only one item of the same kind.

For example, let's add an element to our new_set:

new_set.add(1)
print(new_set)
>>> {1}

As of now, we have only 1 element, which is the integer 1

If we try to add another integer 1 to the set:

new_set.add(1)

It won't affect the new_set because it already has this element.

After printing again the new_set:

print(new_set)
>>> {1}

We get the same result.

To delete an item from a set use .remove(element):

new_set.remove(1)
print(new_set)
>>> set()

Another important feature is the ability to check if an item is already in our set:

if 1 in new_set:
	print("1 integer is in our new_set")
elif "1" in new_set:
	print("1 string is in our new_set")
else:
	print("no 1 is in our new_set")
>>> "1 integer is in our new_set"