Chapter 1

Python can bite you if you go deep without basic stuff. So Learn Basics

length = int(input('Enter the length of the rectangle (Only numbers):\n'))
width = int(input('Enter the width of the rectangle (Only numbers):\n'))
area = length * width
perimeter = 2*(length + width)
print(f'Area of the Rectangle:\n{area}')
print(f'Perimeter of Rectangle:\n{perimeter}')

height = 5
width = int(input('Enter the width of the rectangle (Only numbers): '))
print(((width*'O')+'\n')*height))