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Editorial Team
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Asked: 2026-06-09T21:19:43+00:00

Suppose I have two classes, say Manager and Graph , where each Graph has

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Suppose I have two classes, say Manager and Graph, where each Graph has a reference to its manager, and each Manager has references to a collection of graphs that it owns. I want to be able to do two things

1) Copy a graph, which performs a deepcopy except that the new graph references the same manager as the old one.

2) Copy a manager, which creates a new manager and also copies all the graphs it owns.

What is the best way to do this? I don’t want to have to roll my own deepcopy implementation, but the standard copy.deepcopy doesn’t appear to provide this level of flexibility.

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1 Answer

  1. Editorial Team

    If there are no other objects referenced in graph (just simple fields), then copy.copy(graph) should make a copy, while copy.deepcopy(manager) should copy the manager and its graphs, assuming there is a list such as manager.graphs.

    But in general you are right, the copy module does not have this flexibility, and for slightly fancy situations you’d probably need to roll your own.

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