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I have objects which have an attribute containing a list of references to other objects (basically a network data structure). For debugging I'd like to see how objects are referenced.

Do you know a tool that can display this graphically?

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    Is this what you're after? mg.pov.lt/objgraph Commented Jan 25, 2012 at 12:53
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    Yes. Thanks!!! I didn't guess correct keywords for googling. Are there more alternatives? I believe once I saw one. But I try objgraph first :) Commented Jan 25, 2012 at 12:57
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    @Gerenuk you should post this as an answer. Commented Jan 25, 2012 at 12:59

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(Reposting as an answer)

objgraph ( http://mg.pov.lt/objgraph/ ) uses Graphviz to render graphs (as in networks, not plots) of Python objects. (On PyPI). It works with Python 2 or 3. Its homepage has several examples of how to use it.

I don't know of any alternatives, but I haven't spent long looking.

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Thanks!!! I was just looking for UML for Python and by accident I found what I had seen before. That looks similar: greenteapress.com/thinkpython/swampy/lumpy.html
You can also use github.com/nfergu/referrers.

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