Exercise: Polygon

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• Implement a class representing a Point.
• Make the printing of a point instance nice.
• Implement a class representing a Polygon. (A list of points)
• Allow the user to "move a polygon" calling poly.move(dx, dy) that will change the coordinates of every point by (dx, dy)

examples/oop/composition/polygon-skeleton.py

class Point():
    pass

class Polygon():
    pass

p1 = Point(0, 0)  # Point(0, 0)
p2 = Point(5, 7)  # Point(5, 7)
p3 = Point(4, 9)  # Point(4, 9)
print(p1)
print(p2)
print(p3)
p1.move(2, 3)
print(p1)         # Point(2, 3)

poly = Polygon(p1, p2, p3)
print(poly)       # Polygon(Point(2, 3), Point(5, 7), Point(4, 9))
poly.move(-1, 1)
print(poly)       # Polygon(Point(1, 4), Point(4, 8), Point(3, 10))