doh.
ok, so, recursion is just functional programming sugar for a loop.
def get_As(L):
checking = [elem for elem in L if isinstance(elem, list)] # the
equivalent of elem in recursion
all_As = [elem for elem in L if isinstance(elem, A)]
while checking:
new_checking = [] # all lists in all lists in checking
for sub_L in checking:
for elem in sub_L:
if isinstance(elem, A):
all_As.append(elem)
elif isinstance(elem, list):
new_checking.append(elem)
checking = new_checking
return all_As
yomgui wrote:
> I forgot the most important, I am looking for a non recursive method.
>
> thanks
>
> yomgui
>
> yomgui wrote:
> >
> > Hi,
> >
> > I have a list of data (type A)
> > my list can includes element of type A or a lists,
> > these list can includes element of type A or a lists, and so on ...
> >
> > is there a simple way to obtain a single list of all the elemets
> > of type A ?
> >
> > thanks
> >
> > yomgui
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