[Community] Polygon difference

[johnny xia]

Hi,

I am using shapely.geometry for Pytong to do some polygon operation. Here is
a short description of my problem is:

I have a Polygon A, B, C. B and C is contained in A. Now I want to calculate
the polygon of (A - (B + C) ). If result Polygon has holes, I want to
convert it to a MultiPolygons.

Any idea about how to use shapely.geometry to resolve the above problem.

-- 
Thanks,
Johnny Xia.
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