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Querying the set of installed packages



Hi...

I was just wondering what would be considered the most robust and
efficient way to query the set of installed packages on a system.

I noticed that debsums does so by parsing /var/lib/dpkg/status; it
also seemed possible by listening to "dpkg -l".  Since I'm working
in Python, dpkg-python sprang to mind, but after a brief examination
it didn't appear to be a very accessible body of code.

Suggestions?

-- 
Peter Eckersley                         http://www.cs.mu.oz.au/~pde 
(pde@cs.mu.oz.au)              TLI:  http://www.computerbank.org.au
<~~~~.sig temporarily conservative pending divine intervention~~~~>
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