what does super(something) do in pythpn code example

Example 1: python super

# It's kinda hard to explain this just by code.
# So I'll provide a link to a pretty good explanation of it.
https://www.pythonforbeginners.com/super/working-python-super-function

Example 2: python super

class Square(Rectangle):
    def __init__(self, length):
        super().__init__(length, length)