>>> from vimage import VImage
>>> vi = VImage('scene 1')
>>> vi.name
'scene 1'
>>> len(vi)
0
>>> from circle import Circle
>>> from point import Point
>>> c = Circle(Point(0, 0), 1, (100, 200, 50))
>>> id = vi.add(c)
>>> id
1
>>> isinstance(vi[id], Circle)
True
>>> len(vi)
1
>>> vi[1].radius
1
>>> from polygon import Polygon
>>> pol = Polygon((200, 0, 200), [])
>>> pol.add(Point(10, 10))
>>> pol.add(Point(15, 10))
>>> pol.add(Point(8, 15))
>>> id = vi.add(pol)
>>> id
2
>>> len(vi[id])
3
>>> len(vi)
2
>>> c2 = Circle(Point(-10, -10), 2, (200, 200, 0))
>>> vi.add(c2)
3
>>> 3 in vi
True
>>> 0 in vi
False
>>> vi.remove(3)
>>> len(vi)
2
>>> str(vi)
'Vectorial image scene 1 of 2 figures'
>>> d = vi.to_dict()
>>> d == [{'type': 'circle', 'value': {'center': {'x': 0, 'y': 0}, 'radius': 1, 'color': [100, 200, 50]}},  {'type': 'polygon', 'value': {'color': [200, 0, 200], 'vertices': [{'x': 10, 'y': 10}, {'x': 15, 'y': 10}, {'x': 8, 'y': 15}]}}]
True
>>> vi2 = VImage.from_dict('test', d)
>>> len(vi2)
2
>>> vi2.name
'test'
>>> vi2[1].center.x
0
>>> vi2[1].center.y
0
>>> len(vi2[2])
3
>>> vi2.to_json('xetedgdjd077.json')
>>> vi3 = vi.from_json('xetedgdjd077.json')
>>> vi3.name = 'test'
>>> vi3 == vi2
True