Is there some smart/fast way to flatten a level one list using the latest iterator/generator idioms.
The problem arises in coneverting lists of (x,y) coordinates into a single list of coordinates eg f([(x0,y0),(x1,y1),....]) --> [x0,y0,x1,y1,....] or g([x0,x1,x2,......],[y0,y1,y2,....]) --> [x0,y0,x1,y1,....] clearly if f is doable then g can be done using zip. I suppose this is a special case flatten, but can flatten be done fast? The python recipes seem rather slow compared to the builtin functions. -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
