How to use the dynetx.classes.dyngraph.DynGraph function in dynetx

This returns a "deepcopy" of the edge, node, and
        graph attributes which attempts to completely copy
        all of the data and references.

        This is in contrast to the similar G=DynDiGraph(D) which returns a
        shallow copy of the data.

        See the Python copy module for more information on shallow
        and deep copies, http://docs.python.org/library/copy.html.

        Warning: If you have subclassed DiGraph to use dict-like objects
        in the data structure, those changes do not transfer to the Graph
        created by this method.
        """
        from .dyngraph import DynGraph
        H = DynGraph()
        H.name = self.name
        H.add_nodes_from(self)

        if reciprocal is True:
            for u in self._node:
                for v in self._node:
                    if u >= v:
                        try:
                            outc = self._succ[u][v]['t']
                            intc = self._pred[u][v]['t']
                            for o in outc:
                                r = set(range(o[0], o[1] + 1))
                                for i in intc:
                                    r2 = set(range(i[0], i[1] + 1))
                                    inter = list(r & r2)
                                    if len(inter) == 1: