getting all objects affected by a given object

[fruit...@gmail.com]

Hi,
I was wondering if there is a way to get maya objects affected by a given object ?

When you select something in the viewport, everything affected by your selection will be displayed in wireframe purple. Is there a command to get this result ? (something like obj1.isAffectedBy(obj2) returning a bool)
The only way I see to do it would be to do some recursive function but I'm not sure how reliable it'd be (e.g. a constraint would be- connected on both source/destination to the same network)

Thank you !

[Marcus Ottosson]

Hey Vincent, have a look at the cmds.listHistory command.

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[fruit...@gmail.com]

hi Marcus,

I initially started with listHistory, which works fine in 99.99% of the situations, but in some complex situations I don't get accurate results (just like sometimes maya fail in setting correctly the purple wireframe), no matter which flags I use.
I just wanted to make sure I wasn't missing something obvious, but I'll keep searching. Out of curiosity, any idea how maya is doing it internally ? A regular graph parsing ?