Is there a way to append a dumped dictionary or a dumped object in general using python?
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I have a dictionary let say:

    d = {"a": 1, "b": 2, "c": 3 }

All I want to do is to dump this dictionary into a file and then append
it with data produced by my program little by little. I don't want to have
the dictionary data in memory during the running of the program. By the end I
want to be able to load this file into a python structure from another
program.

Is there a solution to do this using `pickle` or `json` or another python
module? I know that you can't append to a dumped object in a pickle-file.

I know that I can do something like this:

    d = pickle.load(open(fileName, 'rb'))
    d.update(dictWithNewValues)
    pickle.dump(d, open(fileName, 'wb'))

as described [here][1]. But I want to do it progressively.. I understand that this may be difficult to do that way because dictionary has unique keys, so to be append it the current keys should be known to avoid conflicts (entries with same keys..).

So, is there a way to do it in a `list` or another python object?



  [1]: http://www.python-forum.org/pythonforum/viewtopic.php?f=3&t=20779