possible issue with bob.extension.config.load mechanism

In this part of the code https://gitlab.idiap.ch/bob/bob.extension/blob/master/bob/extension/config.py#L82, the new config load mechanism cleans a lot of stuff from the module loading including information that might be useful (like imports).

For example, take config file example (lots of test cases from bob.bio.base are like that):

import numpy

class RandomPrints(object):
    def __init__(self):
       pass
       
    def __call__(self):
        return numpy.random.rand()


random_prints = RandomPrints()

When I try to execute it:

from bob.extension.config import load

config = load(["bug_config.py"])
print(config["random_prints"]())

I got the error:

AttributeError: 'NoneType' object has no attribute 'random'

The import numpy is lost in the context (on purpose).

This issue raises a philosophical question @bob and would be nice to have some feedback from you. The configs should be just simple configs or should carry some extra complexity (class definitions for instance)?

Thanks