How to (Python) get value from __init__ in same dir
If you get
ImportError: attempted relative import with no known parent package
when you do like
import . from something
especially from the script executed, just try
from __init__ import something
Even though it could be problematic when there are many
sys.path, it would be helpful in some simple situaions.
I see ‘import from parent module’ as an anti-pattern in Python. Imports should be the other way around. Importing from modules’s
__init__.py is especially problematic. As you noticed, importing module
foo/bar.py involves importing
foo/__init__.py first, and you may end up with a circular dependency. Adding a
print("Importing", __name__) to your init files helps see the sequence and understand the problem.
I’d suggest that you moved the code you want to import in
__init__.py to a separate lower-level module, and just import some names from that module in
__init__.py to expose it at higher level.
Let’s suppose that you had some
class Bar in your
__init__.py. I'd reorganize it the following way.
from bar import Bar # exposed at the higher level, as it used to be.
class Bar(object): ...
from . import Bar # Now it works.
__init__.py should contain nothing but imports from lower-level modules, or nothing at all.
Contact me: Hung, Chien-Hsiang (chienhsiang-hung.github.io)