On Aug 7, 5:26 pm, GZ <[email protected]> wrote:
> I am wondering if there is a module that can persist a stream of
> objects without having to load everything into memory. (For this
> reason, I think Pickle is out, too, because it needs everything to be
> in memory.)
>From the pickle docs it looks like you could do something like:
try:
import cPickle as pickle
except ImportError
import pickle
file_obj = open('whatever', 'wb')
p = pickle.Pickler(file_obj)
for x in stream_of_objects:
p.dump(x)
p.memo.clear()
del p
file_obj.close()
then later
file_obj = open('whatever', 'rb')
p = pickle.Unpickler(file_obj)
while True:
try:
x = p.load()
do_something_with(x)
except EOFError:
break
Your loading loop could be wrapped in a generator function, so only
one object should be held in memory at once.
--
http://mail.python.org/mailman/listinfo/python-list
