python - Shapely difference of completely overlapping shapes -

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with python shapely can build polygons (here circle , rectangle) , built difference , sum of them described in shapely manual (http://toblerity.org/shapely/manual.html). "assertion error" when move rectangle position indicated in red.

enter image description here

edit / answer

sorry! found answer right after posting question: difference operation of course create 2 shapes. 1 can loop on them this:

result = box.difference(circle) shape in result:     ax.add_patch(polygonpatch(shape))

the answer in edit @ bottom of question-post.


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