who called a function?

[kosh at aesaeion.com]

How can I find out what object called a function and essentially step back
through that? At most I need to step back about 4 to 5 levels but it would
be very useful for me to find a particular object back up the list and
change behavior based on that. Mostly I just wants the self var as I step
back until I find the one I want.

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