changing sys.path
Andrea Crotti
andrea.crotti.0 at gmail.com
Fri Feb 10 09:51:20 EST 2012
Ok now it's getting really confusing, I tried a small example to see
what is the real behaviour,
so I created some package namespaces (where the __init__.py declare the
namespace package).
/home/andrea/test_ns:
total used in directory 12 available 5655372
drwxr-xr-x 3 andrea andrea 4096 Feb 10 14:46 a.b
drwxr-xr-x 3 andrea andrea 4096 Feb 10 14:46 a.c
-rw-r--r-- 1 andrea andrea 125 Feb 10 14:46 test.py
/home/andrea/test_ns/a.b:
total 8
drwxr-xr-x 3 andrea andrea 4096 Feb 10 14:47 a
-rw-r--r-- 1 andrea andrea 56 Feb 10 14:35 __init__.py
/home/andrea/test_ns/a.b/a:
total 8
drwxr-xr-x 2 andrea andrea 4096 Feb 10 14:47 b
-rw-r--r-- 1 andrea andrea 56 Feb 10 14:35 __init__.py
/home/andrea/test_ns/a.b/a/b:
total 12
-rw-r--r-- 1 andrea andrea 25 Feb 10 14:36 api.py
-rw-r--r-- 1 andrea andrea 153 Feb 10 14:37 api.pyc
-rw-r--r-- 1 andrea andrea 56 Feb 10 14:35 __init__.py
/home/andrea/test_ns/a.c:
total 8
drwxr-xr-x 3 andrea andrea 4096 Feb 10 14:47 a
-rw-r--r-- 1 andrea andrea 56 Feb 10 14:35 __init__.py
/home/andrea/test_ns/a.c/a:
total 8
drwxr-xr-x 2 andrea andrea 4096 Feb 10 14:47 c
-rw-r--r-- 1 andrea andrea 56 Feb 10 14:35 __init__.py
/home/andrea/test_ns/a.c/a/c:
total 12
-rw-r--r-- 1 andrea andrea 20 Feb 10 14:36 api.py
-rw-r--r-- 1 andrea andrea 148 Feb 10 14:38 api.pyc
-rw-r--r-- 1 andrea andrea 56 Feb 10 14:35 __init__.py
So this test.py works perfectly:
import sys
sys.path.insert(0, 'a.c')
sys.path.insert(0, 'a.b')
from a.b import api as api_ab
from a.c import api as api_ac
While just mixing the order:
import sys
sys.path.insert(0, 'a.b')
from a.b import api as api_ab
sys.path.insert(0, 'a.c')
from a.c import api as api_ac
Doesn't work anymore
[andrea at precision test_ns]$ python2 test.py
Traceback (most recent call last):
File "test.py", line 7, in <module>
from a.c import api as api_ac
ImportError: No module named c
Am I missing something/doing something stupid?
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