avoid import short-circuiting

Fri Mar 16 18:04:04 EDT 2012

On 03/16/2012 05:19 PM, Robert Kern wrote:
> On 3/16/12 4:49 PM, Andrea Crotti wrote:
>> I started the following small project:
>>>> https://github.com/AndreaCrotti/import-tree
>>>> because I would like to find out what exactly depends on what at 
>> run-time, using
>> an import hook.
>>>> It works quite well for small examples but the main problem is that 
>> once a
>> module is imported
>> it's added to sys.modules and then it doesn't go through the import 
>> hook anymore.
>>>> I tried to mess around with sys.modules but it might not be a good 
>> idea, and it
>> leads to easy
>> infinite loops.
>> Is there a good way to achieve this?
>> I guess I could do the loop detection myself, but that should not be 
>> too hard..
>> You want to monkeypatch __builtin__.__import__() instead. It always 
> gets called.
>
Seems like a good idea :)
My first attempt failes though
def full(module):
 from __builtin__ import __import__
 ls = []
 orig = __import__
 def my_import(name):
 ls.append(name)
 orig(name)
 __import__ = my_import
 __import__(module)
 __import__ = orig
 return ls
it imports only the first element and doesn't import the dependencies..
Any hints?