我需要做一个矩形数据类和一个可执行程序来测试它。在

*这是我的错误消息*>>> ================================ RESTART ================================

>>> Length? 7 (then next line) Width? 8 (then next line)

Traceback (most recent call last):

File "/Users/AngelaDon1/Desktop/Don_Asst4/Assg4_Don.py", line 26, in

main()

File "/Users/AngelaDon1/Desktop/Don_Asst4/Assg4_Don.py", line 16, in main

print(rectangle.get_length(), rectangle.get_width())

# print the length & width

AttributeError: 'tuple' object has no attribute 'get_length'

>>>

这就是我要处理的全部问题：

在可执行文件的主函数中：

^{pr2}$

我的问题是，为什么我的代码没有一直执行。

这是跑步时的样子：也许我也错过了什么。。。在SAMPLE OUTPUT

Enter the length 12.45

Enter the width 8.973

Length: 12.45

Width: 8.973

Rectangle area is 111.71

Rectangle perimeter is 42.85

Changed rectangle area is 352.81

Changed rectangle perimeter is 76.27

如果有人想提供其他方面的建议，请提供。这是矩形类的内容：class rectangle:

def __init__(self, length, width): # this initializes the object with the given parameters

self.__length = length # assign length

self.__width = width # assign width

def set_length(self, length): # this method allows us pass the Rectangle object a value and set the object's length to the given value

self.__length = length # assign length

def set_width(self, width): # had 'model' here # same thing, for width

self.__width = width # assign width

def get_length(self):

return self.__length

def get_width(self):

return self.__width

def get_area(self): # multiples w x h

return self.get_width() * self.get_length()

def get_perimeter(self):

return self.get_width() * 2 + self.get_length() * 2

这是我的主要档案：import rectangle

def main():

length = float(input('Length? ')) # turn length string to float

width = float(input('Width? ')) # turn width string into float

rectangle = (length, width)

print(rectangle.get_length(), rectangle.get_width()) # print the length & width

print(round(rectangle.get_area(), 2))

print(round(rectangle.get_perimeter(), 2))

print(round(rectangle.get_area(), 2))

print(round(rectangle.get_perimeter(), 2))

main()