CODEWITHSUNDEEP
python
ovatsug25
ovatsug25

Reputation: 8596

common import statement for similar classes

In my app, I have a model folder / package.

In that model folder, I generally have a whole bunch of import statements (most of them from SQLAlchemy, such as String, Integer, Session, etc.

I find myself writing the same import statements again and again for stuff like User, Blog, Article, Etc. and have become pretty sloppy at it.

Understanding that explicit is better than implicit and then going ahead and disregarding that, is there a way to do this once?

Upvotes: 3

Views: 70

Answers (2)

Joran Beasley
Joran Beasley

Reputation: 113988

this probably isnt what you want but who knows

common_imports.py

 from sqlalchemy import Model,String,...

in other scripts just do

from common_imports import *

[edit] actually I came up with a really awful and hacky way to do what you want

a really hacky way to do it might be something like

\root_of_package
    -main.py
    \models
       -__init__.py
       -model1.py
       -model2.py

then in models\__init__.py

from sqlalchemy import String,Integer,...
from glob import glob
Base = ...
for fname in glob("%s/*.py"%dirname(__file__)):
    with open(fname) as f:
        eval(f.read())
__all__ = locals()

then in models/model1.py

#just use all the imports/locals from __init__.py as if they already existed
#this will be hellish if you use an IDE that checks for errors for you
class Model1(Base):
      id = Column(Integer,primary_key=True)
      ...

then in main.py

from models import Model1

Upvotes: 4

Adam Smith
Adam Smith

Reputation: 54213

I do this in one of my applications.

# approot/m.py

from models.model import String, Integer, Session, (etc)

# Otherwise blank!

Then in everything else:

import m

Then you can do m.String, m.Integer, m.Session and etc. This also means I can further encapsulate my code so that later when I write up user models I can just add to m.py

from models.user import User, Group, PermissionSet

and continue to access m.User, m.Group and etc.

Upvotes: 4

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