George Sakkis produced the following cookbook recipe, which addresses a common problem that comes up on this mailing list:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/521877 I would propose adding something like this to the cookbook example above. def iterblocks2(lst, start_delim): # This variation on iterblocks shows a more typical # implementation that behaves like iterblocks for # the Hello World example. The problem with this naive # implementation is that you cannot pass arbitrary # iterators. blocks = [] new_block = [] for item in lst: if start_delim(item): if new_block: blocks.append(new_block) new_block = [] else: new_block.append(item) if new_block: blocks.append(new_block) return blocks Comments welcome. This has been tested on George's slow-version-of-string-split example. It treates the delimiter as not being part of the block, and it punts on the issue of what to do when you have empty blocks (i.e. consecutive delimiters). ____________________________________________________________________________________ Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=list&sid=396545433 -- http://mail.python.org/mailman/listinfo/python-list
