Generate/"fake" a PolyDraw-like object programmatically

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Hi, I’m using a tool which calls PolyDraw for the user to draw a number of rectangles on an image. However, I want to specify the coordinates programmatically. I can create a Polygons object, but its data attribute looks like this:

[OrderedDict([('x',
               array([ 0.        ,  0.        , 78.89600967, 78.89600967])),
              ('y',
               array([  0.        , 326.79372197, 326.79372197,   0.        ]))]),
 OrderedDict([('x',
               array([236.68802902, 236.68802902, 315.58403869, 315.58403869])),
              ('y',
               array([  0.        , 326.79372197, 326.79372197,   0.        ]))]),
 OrderedDict([('x',
               array([  0.        ,   0.        , 315.58403869, 315.58403869])),
              ('y',
               array([ 0.        , 81.69843049, 81.69843049,  0.        ]))]),
...

…whereas the PolyDraw’s data looks like this:

PolyDraw(data={'xs': [[2.8796791443850234, 2.8796791443850234, 87.37165775401068, 87.37165775401068], [222.55882352941174, 313.81016042780743, 310.4304812834224, 215.7994652406417]], 'ys': [[5.169958140283405, 320.4390164362475, 321.90538414925203, 6.6363258532878895], [6.6363258532878895, 6.6363258532878895, 320.4390164362475, 318.9726487232431]]})}

I can generate either type of dicts, but I’m not sure how to put it into a “fake” PolyDraw object as the program later calls it, uses it, and expects it to sort of act like a “proper” PolyDraw object.