<p>运行程序时出错</p>
<pre><code>Enter the length of the rectangle: 4
Enter the width of the rectangle: 2
Traceback (most recent call last):
File "C:\Users\Shourav\Desktop\rectangle_startfile.py", line 50, in <module>
main()
File "C:\Users\Shourav\Desktop\rectangle_startfile.py", line 34, in main
my_rect = Rectangle()
TypeError: __init__() missing 2 required positional arguments: 'length' and 'width'
</code></pre>
<p>代码:</p>
^{pr2}$