python - Importing a code-containing __init__.py from a cousin folder? -

given directory structure:

program/       setup.py                                             ilm/                                 __init__.py               app/                       __init__.py       bin/                                 script.py 

note: setup.py not typical setup.py, rather custom-made setup uniquely py2app.

program/ilm/app/__init__.py non-empty: contains main() function, instantiates class in same file. question: in program/ilm/bin/script.py, if want import , execute main() function in program/ilm/app/__init__.py, valid ways of achieving this? reason ask script.py doing thus:

import ilm.app app  if __name__ == '__main__':     app.main() 

based on (admittedly limited) understanding of packaging , importing, shouldn't work, since have not explicitly told script.py project/ilm/app/__init__.py using ... , indeed, get:

macbook-pro-de-pyderman:program pyderman$ python ./bin/script.py traceback (most recent call last):   file "./bin/script.py", line 5, in <module>     import ilm.app app importerror: no module named ilm.app 

in contrast, when python interpreter started in /project, import ilm.app app works fine.

this apparently fully-functional production code should not have change running.

1. is import statement valid, given directory structure, , if so, missing?
2. if not, recommended way of getting import work? add path using sys.path.append() above import statement? or use .. notation in import statement explicitly point program pick project/ilm/app/__init__.py? fact __init__.py trying import significant?

two things. need make sure iml directory in python path. either make sure running python right directory or add right path sys.path list. , need make sure both iml , app directory both have

 __init__.py 

file, since python needs interpret whole thing hierarchy of modules rather dirs. should able

 iml import app