----- Mensaje original ----
De: Calvin Spealman <ironfroggy@gmail.com> Para: python-ideas@python.org Enviado: martes, 20 de enero, 2009 22:32:21 Asunto: [Python-ideas] min_fields argument to str.split()
This might be a silly idea, but I was wondering about forcing split() to return at least X number of items. For example, I might be getting a comma separated string and i want to split it up into names, but I might have less than all of them. If it is just 0, 1, or 2, I can use partition(), but any more and that doesn't work. Besides, I don't care if the separator is there, just to get the values. Might also make sense to give the values to give by default.
Example of implementing this:
def split(self, sep=None, max_splits=None, min_items=None): parts = self.split(sep, max_splits) if len(parts) < min_items: parts.extend([None] * (min_items - len(parts))) return parts
Use would be like this:
a, b, c, d = "1,2,3".split(',', None, 4)
How about this? def splitter(string,sep=None,max_splits=-1, min_items=None): parts = string.split(sep,max_splits) for part in parts: yield part for i in range(min_items-len(parts)): yield a, b, c, d = splitter("1,2,3", ",", -1, 4) Vitor ¡Todo sobre la Liga Mexicana de fútbol! Estadisticas, resultados, calendario, fotos y más:< http://espanol.sports.yahoo.com/