Arnaud Delobelle wrote: (...) > > from itertools import chain > > def overlaps(lst): > bounds = chain(*(((x[1],i), (x[2], i)) for i,x in enumerate(lst)))
imho, this is a uselessly painful equivalent of bounds = ((x[k],i) for i,x in enumerate(lst) for k in (1,2)) Cheers, BB -- http://mail.python.org/mailman/listinfo/python-list