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Wed Feb 4 15:15:06 EST 2004 · http://mail.python.org/pipermail/python-dev/2004-February/042409.html

    Chris> I just ran across something that looks like a very unfortunate interface
    Chris> change in the pickle module:

    Chris> Python 2.2:  dump(object, file[, bin])
    Chris> Python 2.3:  dump(object, file[, protocol[, bin]])

>From the docs:

    Changed in version 2.3: The protocol parameter was added. The bin
    parameter is deprecated and only provided for backwards compatibility.
    You should use the protocol parameter instead.

I don't know if that's sufficient for your needs, but it does suggest that
dump() calls which used the bin parameter should be inspected.

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[Python-Dev] pickle.dump(..) interface change ... documentation