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How can I call python module inside version package folder?

I need to write python codes that run inside a host application. The python codes need to be deployed under a specific folder of the host application. I have to put my python input module under the root of a specific folder. And I want to put all my other python and c / c ++ dll codes under a sub folder, I prefer to name the sub folder like XXX-1.0, the number is the version of my python codes. The python login module is just simple to call the python module in a sub folder.

In this way, different python codebases can be deployed together without collision. May I know if this is possible or not? Thanks.

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3 answers


I'm not sure if I understand your question correctly, but here is an easy way to have multiple versions of a package without collisions.

Directory structure:

C:\tmp\eggs>dir /B /S
C:\tmp\eggs\libs
C:\tmp\eggs\test.py
C:\tmp\eggs\libs\foo-1.0.egg
C:\tmp\eggs\libs\foo-2.0.egg
C:\tmp\eggs\libs\foo-1.0.egg\foo.py
C:\tmp\eggs\libs\foo-2.0.egg\foo.py

Now the contents of the files:

# contents of C:\tmp\eggs\libs\foo-1.0.egg\foo.py
version=(1,0)

      

        
        
        
      

    


# contents of C:\tmp\eggs\libs\foo-2.0.egg\foo.py
version=(2,0)

      

        
        
        
      

    


#contents of C:\tmp\eggs\test.py:

import sys
sys.path.insert(1, 'libs')
from pkg_resources import require

require('foo<1.5')
import foo
print foo.version
# will output (1,0)

If you change 'foo<1.5'

to 'foo>1.5'

, or the 'foo'

output changes to(2,0)

You will find details in the setuptools documentation.

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If you created a file .pth

eg. X.pth

And put XXX-1.0

inside as content

XXX-1.0\
        - xxx.py
X.pth

Then you could import xxx



Note : only checked in the site-packages folder, I'm not sure if you could put your subfolder anywhere.

Edit : For example wxPython does this as it can have multiple versions on the same machine.

wx-2.8-msw-unicode \
                    wx
                      \
                       more stuff
wx.pth (wx-2.8-msw-unicode)
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This is how I did it:

tools
  |-- packageA
        |-- packageA-1.0
              |-- packageA
                    |-- modules
        |-- packageA-2.0
              |-- packageA
                    |-- modules
  |-- packageB
        ...

So, if you want to upgrade, just add / packageA / packageA -2.0 to PYTHONPATH and you can still do import packageA

.

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