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        "author": "Ross Anderson",
        "author_email": "ross.anderson@ualberta.ca",
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        "description": "undoredo\n--------\n\nundo/redo functionality for arbitrary python classes\n\nSupports Python 3. Might work in Python 2.\n\n> Author: Ross Anderson ([rosshamish](https://github.com/rosshamish))\n\n### Installation\n\n```\npip install undoredo\n```\n\n### Usage \n\nAny class can gain undo/redo functionality by doing the following:\n\n- keep around an instance of UndoManager\n- annotate undoable methods with the @undoable decorator\n- implement do(), undo(), and redo() methods as shown in the following example\n- implement copy(), and restore(obj) methods\n  - where copy() returns a copy of the object (probably a deep copy)\n  - where restore(obj) restores the calling object to the state of the passed object\n\n### Example\n\n```\nimport undoredo\n\nclass Counter(object):\n    def __init__(self, value=0):\n        self.undo_mgr = undoredo.UndoManager()\n        self.value = value\n\n    @undoredo.undoable\n    def increment(self):\n        self.value += 1\n\n    @undoredo.undoable\n    def decrement(self):\n        self.value -= 1\n\n    def do(self, command):\n        return self.undo_mgr.do(command)\n\n    def undo(self):\n        return self.undo_mgr.undo()\n\n    def redo(self):\n        return self.undo_mgr.redo()\n\n    def copy(self):\n        return Counter(self.value)\n\n    def restore(self, counter):\n        self.value = counter.value\n\nc = Counter(0)  # 0\nc.increment()   # 1\nc.increment()   # 2\nc.undo()        # 1\nc.redo()        # 2\n```\n\n### License\n\nGPLv3",
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