Who is your daddy: Can I find what object instantiates another object?

[Diez B. Roggisch]

hubritic schrieb:
> I want to build a parser object that handles two different log file
> formats.  I have an object that handles Connection logs and an object
> for Filter logs.  Each will instantiate a Parser object, passing in
> the path to individual log files.
> 
> There are a number of ways I could figure out whether I am dealing
> with connection or filter log.
> 
> I could pass it in when creating the Parser, but that doesn't seem
> very pythonic.

What makes you believe that?

> I could figure out the type of log file a particular instance of the
> Parser is working with by looking at the format of the file. This
> wouldn't be hard but it seems unnecessary.
> 
> It would be jiffy if I could find what kind of object instantiated
> that particular parser. So if a FilterLog object instantiated it, the
> parser would know to parse a Filter log.
> 
> Can the Parser object know who its Daddy is?

Yes, by Daddy telling him so. That's how nature does it, and how you 
should do it. Or do you think that because DNA-tests are available to us 
we should just put all kids into a big pool and make them find out who 
their parents are themselves, once they grew up?

Diez