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12630 :: Calling Python from Nim in Ubuntu 24.04

• TKD (orginal) [2024-12-21T20:14:11+01:00] view original

  In Ubuntu 24.04, to install Python packages that are not in the normal system's repository, you have to use an environment or specify a --break-packages option using python-pip. This is a problem because Nim tries to use the system's packages and not one from the virtual environment.

  How would you call Python libraries from Nimpy in a virtual environment?

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• Clonk (orginal) [2024-12-21T21:50:51+01:00] view original

  The easiest way to do this would be to do in bash before launching your Nim binary.

  
  #!/bin/bash
  nim c $(OPTIONS) $(MAIN) -o $(EXEC_BIN)
  python3 -m venv $(VENV)
  $(BINDIR)/$(EXEC_BIN)
  Run

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• TKD (orginal) [2024-12-22T09:29:24+01:00] view original

  OK, thanks. I will try that.

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• TKD (orginal) [2024-12-24T11:37:35+01:00] view original

  For posterity, the solution was to first find the correct libpython. To do this, follow these instructions from the nimpy GitHub page:

  • pip3 install find_libpython
  • python3 -c 'import find_libpython; print(find_libpython.find_libpython())'

  OR

  • conda install conda-forge::find-libpython
  • python3 -c 'import find_libpython; print(find_libpython.find_libpython())'

  For me, this produced: /home/tkd/anaconda3/lib/libpython3.12.so.1.0.

  Then in your Nim file, do:

  
  import nimpy
  import nimpy/py_lib
  
  py_lib.pyInitLibPath("/home/tkd/anaconda3/lib/libpython3.12.so.1.0")
  Run

  You can then import whatever Python package/library you want to use from the virtual environment.

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