How do I import from another folder in python?

Question

I've seen tips on how to import from a subfolder. The problem is importing from another folder in the same parent folder. The current structure is like this:

test 
__init__.py
|-- folder1
|-- __init__.py
| |-- A.py
|-- folder2
| |-- __init__.py
| |-- B.py

A.py is:

hi = 1 
print "hi", hi

B.py is:

from folder1 import A

print "imported"

When I do python B.py, I get an error:

  File "B.py", line 1, in <module>
    from folder1 import A
ImportError: No module named folder1

How can I import A.py? Ideally, folder structure does not change.

python version 2.7, I'm using anaconda python in my home directory, /Applications/anaconda/bin/python — Pippi
– Pippi, Commented Nov 19, 2015 at 21:42

wim · Accepted Answer · 2015-11-19 23:35:58Z

1

The problem here is that folder1 and folder2 are subpackages, and the package is the parent directory i.e. test.

Whatever path the parent directory of test is will need to be in your sys.path. You can do this, for example, with the PYTHONPATH environment variable.

Then you should have, in module B.py:

from test.folder1 import A

edited Nov 19, 2015 at 23:35

answered Nov 19, 2015 at 21:42

wim

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