class Foo:
    pass

def hello():
    print('hello, world')

x = 13

class Square():
    def __new__(cls, x):
        instance = super(Square, cls).__new__(cls)
        instance.__init__(x)
        return instance.squared
    def __init__(self, x):
        self.inital = x
        self.squared = x**2  # without .self the variable would be shared among all instances
    def __str__(self):
        return str(self.__class__) + ": " + str(self.__dict__)

area = Square(5.5) # if __new__ wasn't implemented, instead of 30.25 float print would call __str__ and return  <class '__main__.Square'>: {'inital': 5.5, 'squared': 30.25}
print(area)