I see no recursion in the problem as stated. Can a polygon contain
another polygon?
I can see that if you had ...
e_1 = [(0,0),(3,0)]
e_2 = [(3,0),(2,3)]
e_3 = [(2,3),(0,0)]
triangle_1 = [e_1,e_2,e_3]
w_1 = [triangle_1,]
... you might want to make a copy of triangle_1 that was offset
PEP 8 says ...
Files using ASCII (or UTF-8, for Python 3.0) should not have a coding
cookie.
What about a BOM (Byte Order Mark)? Per Wikipedia ...
http://en.wikipedia.org/wiki/Byte-order_mark#endnote_UTF-8)
'In UTF-8, this is not really a "byte order" mark. It identifies the
text as UTF-8 but
