>>> from polygon import Polygon
>>> pol = Polygon((255, 0, 0), [])
>>> from point import Point
>>> pol.add(Point(-5, -5))
>>> pol.add(Point(-5, 5))
>>> pol.add(Point(0, -2.5))
>>> len(pol)
3
>>> pol.color
(255, 0, 0)
>>> str(pol[0])
'Point (-5, -5)'
>>> str(pol)
'Polygon of 3 vertices'
>>> pol1 = Polygon((255, 0, 0), [Point(-5, -5), Point(-5, 5), Point(0, -2.5)])
>>> pol1 == pol
True
>>> pol2 = Polygon((255, 0, 0), [Point(1, 2), Point(2, 3), Point(1.5, 3.7)])
>>> pol1 == pol2
False
>>> str(pol2)
'Polygon of 3 vertices'
>>> d = pol2.to_dict()
>>> d == {'vertices': [{'x': 1, 'y': 2}, {'x': 2, 'y': 3}, {'x': 1.5, 'y': 3.7}], 'color': [255, 0, 0]}
True
>>> pol3 = Polygon.from_dict(d)
>>> len(pol3)
3
>>> str(pol3[0])
'Point (1, 2)'
>>> str(pol3[1])
'Point (2, 3)'
>>> str(pol3[2])
'Point (1.5, 3.7)'