如何从包内“主”模块导入包模块

Question

My package structure is:

main.py
mapp/
   __init__.py
   core/
     __init__.py
     tobeimported.py
   test/
     __init__.py
     (test modules)
   utils/
     __init__.py
     

The file is executed as script.

looks like:

import mapp.core.tobeimported

def somefunc():
   pass


if __name__ == '__main__':
  pass

But Exception occurs:

Traceback (most recent call last):
  File "utils/blasttofasta.py", line 5, in <module>
    import mapp.core.tobeimported
ImportError: No module named mapp.core.analyzers

How to import tobeimported module? I run the blasttofasta.py from top directory (where main.py is)

EDIT: Maybe better question is: How to get mapp package to the sys.path? Because script file only see its own directory but not the package directory.

Thank you

Answer 1

If I want to including blasttofasta.py or run it as script simultaneously mos important is to have directory containing mapp package in sys.path.

This worked for me:

Before importing mapp (or other module from this package) I wrote into blasttofasta.py:

import os
os.sys.path.append(os.path.dirname(os.path.realpath(__file__))+ '/../../')

This append mapp package path and I can run it as script. On the other side is no problem with is included in another package.

Answer 2

Follow the absolute structure to import.

To import blasttofasta.py in tobeimport.py

ToBeimport contents

from myapp.utils import blasttofasta

Your structure is good.

Answer 3

Two things need to happen:

• Your map directory needs a __init__.py file.

You can simply do this ( naively ):

$ touch /path/to/map/__init__.py

• /path/to/map needs to be in sys.path

Please read: http://docs.python.org/2/tutorial/modules.html for more details.