Import statements

[verbman]

Hi there!

I really enjoy OpenFisca, but I recently encountered an issue.

Here is what I did:

I used the default import statement:
from openfisca_core.model_api import *

Here is what I expected to happen:

It worked but I felt like it's not best practice yet it's current practice and think we should have a conversation about it.

Here is what I propose we do:

from openfisca_core.model_api import MONTH, YEAR

Context

I identify more as a:

• Developer (I create tools that use the existing OpenFisca code).

[Br3nda]

agreed. we might be able to convince the flake8 linter to fail these