recursive map on nested list

[alexandre_irrthum at yahoo.com]

Hello,

I'd like to apply a function to elements of a nested list and wondered
if there is anything more idiomatic and/or shorter than this recursive
way:

>>> def recur_map(f, data):
... 	if isinstance(data, list):
... 		mapped_list = []
... 		for i in data:
... 			mapped_list.append(recur_map(f, i))
... 		return mapped_list
... 	else:
... 		return f(data)
...
>>> recur_map(lambda x: x*2, [[1, 2], 3, 4, [5, 6, [7, 8]]])
[[2, 4], 6, 8, [10, 12, [14, 16]]]

Thanks,

alex