Dale Amon <a...@vnl.com> writes: > Now I can move on to parsing those pesky Fortran card > images... There wouldn't happen to be a way to take n > continguous slices from a string (card image) where each > slice may be a different length would there? Fortran you > know. No spaces between input fields. :-) > > I know a way to do it, iterating over a list of slice sizes, > perhaps in a list comprehension, but some of the august python > personages here no doubt know better ways.
It's a challenge to do it in a list comprehension, but here it is! Warning: unpythonic code follows(*). Sensitive readers may want to look away now. >>> data 'AAABBBBBCCCCCCCCCDD' >>> field_sizes [3, 5, 9, 2] >>> [data[i:j] for j in [0] for s in field_sizes for i, j in [(j, j+s)]] ['AAA', 'BBBBB', 'CCCCCCCCC', 'DD'] >>> Now you can look again. (*) Pythonicity is often much debated as it lies for a good part in the eye of the snake charmer. I don't think this snippet would generate much debate! -- Arnaud -- http://mail.python.org/mailman/listinfo/python-list
