python 2.7 - Import Madness: using absolute imports doesn't work -

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recently, working on project, had sandbox, developing part of application. idea develop features in sandbox, , after tests, move proper project packages. please, not discuss approach, main case import problem, not work organisation.

using approach, structure of sandbox:

 sandbox   |   +- importer       |       +-- __init__.py              +-- ca            |            +-- __init__.py            +-- ca.py            +-- zombie.py

content of files:

  • importer/__init__.py

    import importer.ca

  • importer/ca/__init__.py

    from ca import *

  • importer/ca/ca.py

    import importer.ca.zombie zombie

all other files empty.

after running python interpreter:

>>> import importer traceback (most recent call last):   file "<stdin>", line 1, in <module>   file "importer\__init__.py", line 1, in <module>     import importer.ca   file "importer\ca\__init__.py", line 1, in <module>     ca import *   file "importer\ca\ca.py", line 2, in <module>     import importer.ca.zombie zombie attributeerror: 'module' object has no attribute 'ca'

there sandbox directory in sys.path.

when delete content of importer/ca/ca.py, i'm able import importer. moreover, when change content of importer/ca/ca.py import importer.ca.zombie or import zombie or from importer.ca import zombie work fine. going further, using 1 of option work, print out module cache:

>>> import sys >>> in sorted(sys.modules.keys()): print

i get:

... errno exceptions functools genericpath importer importer.ca importer.ca.ca importer.ca.importer importer.ca.zombie importer.importer linecache locale nt ...

importer.ca.importer , importer.importer nones. , how did ther go there?

so, summarize, question not how make work, why works way. why can't use absolute import path import importer.ca.zombie zombie , what's going on in sys.module cache?


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