[PyQt] connections vs. instance variables

[Eric Frederich]

I constantly find myself with options like...
a) create a connection from foo's custom signal to bar's slot.... or
b) when creating the foo object, give it a reference to bar, and instead of
emitting a custom signal, just call bar's slot directly.

What is more lightweight.... an instance variable or a connection?

I'm sure this must be common.
Are there guidelines to use, rules of thumb etc?

Thanks,
~Eric
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