serializable.py 文件源码

def clone(cls, obj, **kwargs):
        assert isinstance(obj, Serializable)
        d = obj.__getstate__()

        # Split the entries in kwargs between positional and keyword arguments
        # and update d['__args'] and d['__kwargs'], respectively.
        if sys.version_info >= (3, 0):
            spec = inspect.getfullargspec(obj.__init__)
        else:
            spec = inspect.getargspec(obj.__init__)
        in_order_args = spec.args[1:]

        d["__args"] = list(d["__args"])
        for kw, val in kwargs.items():
            if kw in in_order_args:
                d["__args"][in_order_args.index(kw)] = val
            else:
                d["__kwargs"][kw] = val

        out = type(obj).__new__(type(obj))
        out.__setstate__(d)
        return out