How to properly use relative or absolute imports in Python modules?

Question

Usage of relative imports in Python has one drawback, you will not be able to run the modules as standalones anymore because you will get an exception: ValueError: Att

Answer 1

You need __init__.py in each folder.

Relative import works only when you do:

python test.py

test.py imports foo.py and foo.py can relative import anything from the folder of test.py and above.

You can't do:

cd foo
python foo.py
python bar.py

It will never work.

You can try the sys.path.append or sys.path.insert solution but you gonna screw up the paths and you'll have problems with the f=open(filename).