On Apr 4, 2005 5:29 PM, Tim Roberts <[EMAIL PROTECTED]> wrote:
> If I needed to refer to an 89MB disk file in an
> object, I would replace the data with the file name before pickling. I
> thought pickle recognized a magic method name so the object could "help"
> put itself into a picklable state, but I don't see it now.
You're probably thinking of __setstate__ and __getstate__. Something
like this (untested) should work:
def __getstate__(self):
state = {}
for key in self.__dict__:
# don't pickle "data"
if key != 'data':
state[key] = self.__dict__[key]
def __setstate__(self, state):
self.__dict__.update(state)
# get "data" back from the filesystem
self.data = open(self.file).read()
There is also a __reduce__ method, and copy_reg.pickle.
Paul.
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