Defensive Programming.md

MSNT 657: Defensive Programming

Student Name: Christopher Smith

Professor: Dr. Vandenbrink

numbers = [1.5, 2.3, 0.7, -0.001, 4.4]
total = 0.0

for num in number:
    assert num > 0.0, 'Data should only contain positive values'
    total += num
print('total is:', total)

def normalize_rectangle(rect):
    """ Normalizes a rectangle so that it is at the origin and 1.0 units long on its longest axis
    Input should be of the format (x0, y0, x1, y1). (x0, y0) and (x1, y1) define the lower left and upper right corners of the rectangle, respectively.
    """
    assert len(rect) == 4, 'Rectangles must contain 4 coordinates'
    x0, y0, x1, y1 = rect
    assert x0 < x1, 'Invalid X coordinates'
    assert y0 < y1, 'Invalid Y coordinates'

    dx = x1 - x0
    dy = y1 - y0
    if dx > dy:
        scaled = dx / dy
        upper_x, upper_y = 1.0, scaled
    else:
        scaled = dy / dx
        upper_x, upper_y = scaled, 1.0

    assert 0 < upper_x <= 1.0, 'Calculated upper X coordinate invalid'
    assert 0 < upper_y <= 1.0, 'Calculated upper Y coordinate invalid'

    return (0, 0, upper_x, upper_y)

    print(normalize_rectangle( (0.0, 1.0, 2.0) ))

    print(normalize_rectangle( (0.0, 0.0, 1.0, 5.0) ))
    
    print(normalize_rectangle( (0.0, 0.0, 5.0, 1.0) ))