The requirements for this problem are:
■ Two data fields named width and height.
■ A constructor that creates a rectangle with the specified width and height.
The default values are 1 and 2 for the width and height, respectively.
■ A method named getArea() that returns the area of this rectangle.
■ A method named getPerimeter() that returns the perimeter.
Write a test program that creates two Rectangle objects—one with the
width 4 and height 40 and the other with width 3.5 and height 35.7.
Display the width, height, area, and perimeter of each rectangle in
this order.
I do not need to draw a UML diagram.
class rectangle():
def __init__(self,w=4,h=40):
self.width = width
self.height = height
def compute_area(self):
return (self.height * self.width)
def compute_perimeter(self):
return 2 * (self.height + self.width)
def main_1():
print("Rectangle width is,",self.width)
print("Rectangle height is,",self.height)
print("Rectangle area is,",compute_area)
print("Rectangle perimeter is,",compute_perimeter)
class rectangle_2():
def __init__(self,w=3.5,h=35.7):
self.width = width
self.height = height
def compute_area(self):
return (self.height * self.width)
def compute_perimeter(self):
return 2 * (self.height + self.width)
def main_2():
print("Rectangle 2 width is,",self.width)
print("Rectangle 2 height is,",self.height)
print("Rectangle 2 area is,",compute_area)
print("Rectangle 2 perimeter is,",compute_perimeter)
main_1()
main_2()
When I run the program, it states:
Traceback (most recent call last):
File "C:/Users//OneDrive/Desktop/Programming/7.1.py", line 30, in
main_1()
File "C:/Users//OneDrive/Desktop/Programming/7.1.py", line 10, in main_1
print("Rectangle width is,",self.width)
NameError: name ‘self’ is not defined
I’ve tried seeing how other people have solved this problem but, they all use ‘self’ without defining it as Python wants and the program works. I’m not sure what to do.
>Solution :
Check this code, since it is not clear what you are trying to do
class rectangle():
def __init__(self,width=4,height=40):
self.width = width
self.height = height
def compute_area(self):
return (self.height * self.width)
def compute_perimeter(self):
return 2 * (self.height + self.width)
def main_1(self):
print("Rectangle width is,",self.width)
print("Rectangle height is,",self.height)
print("Rectangle area is,",self.compute_area())
print("Rectangle perimeter is,",self.compute_perimeter())
class rectangle_2():
def __init__(self,width=3.5,height=35.7):
self.width = width
self.height = height
def compute_area(self):
return (self.height * self.width)
def compute_perimeter(self):
return 2 * (self.height + self.width)
def main_2(self):
print("Rectangle 2 width is,",self.width)
print("Rectangle 2 height is,",self.height)
print("Rectangle 2 area is,",self.compute_area())
print("Rectangle 2 perimeter is,",self.compute_perimeter())
rectange = rectangle()
rectange.main_1()
rectange_2 = rectangle_2()
rectange_2.main_2()