[Python-Dev] Question on imports and packages

[Michael Foord]

On 02/11/2010 23:44, Raymond Hettinger wrote:
> Brett,  Does the import mechanism for importing packages preserve enough information to be able to figure-out where all the components are defined?  I'm wondering if it is possible for the class browser to be built-out to scan/navigate class structure across a module that has been split into a package.

Can it not do that through static analysis - just look at the classes / 
functions defined in the sub-modules. I mean, you could do it from the 
ast, right. Relying on importing code to analyse it is unpleasant if the 
code has top level side-effects (which no good code does of course).

There may be *some* cases where magic makes things weird (__package__), 
but how common are those in practise?

If you build up a data-structure representing definitions in a package, 
working out where any individual class / function used in a module is 
defined is a matter of looking at where it is imported (assuming it 
hasn't been aliased or fetched dynamically) and matching the import to a 
package you have analysed (or analyse on the fly).

A project that attempts to do something like this is pysmell:

http://github.com/orestis/pysmell/

All the best,

Michael

> Raymod
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