Class PickleCopier

Lib/test/test_descr.py:5746–5761

This class copies object using pickle.

        """Utility method to generate the many possible pickle configurations.
        """
        class PickleCopier:
            "This class copies object using pickle."
            def __init__(self, proto, dumps, loads):
                self.proto = proto
                self.dumps = dumps
                self.loads = loads
            def copy(self, obj):
                return self.loads(self.dumps(obj, self.proto))
            def __repr__(self):
                # We try to be as descriptive as possible here since this is
                # the string which we will allow us to tell the pickle
                # configuration we are using during debugging.
                return ("PickleCopier(proto={}, dumps={}.{}, loads={}.{})"
                        .format(self.proto,
                                self.dumps.__module__, self.dumps.__qualname__,
                                self.loads.__module__, self.loads.__qualname__))
        return (PickleCopier(*args) for args in
                   itertools.product(range(pickle.HIGHEST_PROTOCOL + 1),
                                     {pickle.dumps, pickle._dumps},