CODEWITHSUNDEEP
pythondllmodulepypi
karamazovbros
karamazovbros

Reputation: 979

Include a DLL in python module (pypi)

I have python module that wraps functions from a DLL in the same directory, and loads the library using ctypes.

__lib = cdll.LoadLibrary("deviceSys.dll")

Here's my directory Layout: 

deviceSys
      - wrapper.py
      - deviceSys.dll
      - __init__.py

I'm following the package guidelines, but I'm not sure how to load the dll once my code is a module on PyPi. For instance, if I use ctypes to load the library, it produces an error, because it's searching locally: OSError: [WinError 126] The specified module could not be found

I need to somehow embed my dll or search for the file within included resources for the package. Is there a way to do this?

Upvotes: 2

Views: 4969

Answers (1)

karamazovbros
karamazovbros

Reputation: 979

I figured it out. You need to add the DLL to the package_data in the setup.py:

include_package_data=True,
package_data={"devsys": ['deviceSystem.dll']},

To get the file from within wrapper.py use the following:

dir = os.path.dirname(sys.modules["devsys"].__file__)
path = os.path.join(dir, "deviceSystem.dll")
__lib = cdll.LoadLibrary(path)

Upvotes: 5

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