what did i do wrong missing 1 required positional argument: 'self'-CodePudding

class Area(object):
    def __init__(self, base, height):
        self.base = base
        self.height = height

    def calculation(self):
        return(self.base * self.height)

area = Area(15, 2)
print(Area.calculation())

CodePudding user response：

The Area in your print() is capitalized, while your variable area is not. That means that you are calling the Area Object instead of the variable.
This should work :

class Area(object):
    def __init__(self, base, height):
        self.base = base
        self.height = height

    def calculation(self):
        return(self.base * self.height)

area = Area(15, 2)
print(area.calculation())

CodePudding user response：

You are calling the class object's calculation method (Area.calculation), instead of calling the calculation method of the Area instance (area.calculation). This works:

class Area(object):
    def __init__(self, base, height):
        self.base = base
        self.height = height

    def calculation(self):
        return self.base * self.height

area = Area(15, 2)
print(area.calculation())

Note the removed parentheses around the return argument - they are unnecessary as return is a keyword, not a function.