Question

If we have a list of strings in python and want to create sublists based on some special string how should we do?

For instance:

l = ["data","more data","","data 2","more data 2","danger","","date3","lll"]
p = split_special(l,"")

would generate:

p = [["data","more data"],["data 2","more data 2","danger"],["date3","lll"]]

Answer 1

itertools.groupby is one approach (as it often is):

>>> l = ["data","more data","","data 2","more data 2","danger","","date3","lll"]
>>> from itertools import groupby
>>> groupby(l, lambda x: x == "")
<itertools.groupby object at 0x9ce06bc>
>>> [list(group) for k, group in groupby(l, lambda x: x == "") if not k]
[['data', 'more data'], ['data 2', 'more data 2', 'danger'], ['date3', 'lll']]

We can even cheat a little because of this particular case:

>>> [list(group) for k, group in groupby(l, bool) if k]
[['data', 'more data'], ['data 2', 'more data 2', 'danger'], ['date3', 'lll']]