Hello everybody:....
I'd like to use the pickle module to save the state of an object so to
be able to restore it later. The problem is that it holds a list of
other objects, say numbers, and if I modify the list and restore the
object, the list itself is not reverted to the saved one, but stays
with one element deleted.
-----------------------Your problem is in the class definition of A. You declare objects as
class A(object):
objects = []
-----------------------
a class variable, so it is shared between every instance of the class.
When you pickle the instance a, then restore it, it continues to
reference the same list, which is help by the class.
You probably want the objects list to be an instance variable, like this:
class A(object):
def __init__(self):
self.objects = []
If you make that change, pickling and unpickling works the way you expect.
--
Jerry
