Invalid Python interpreter when using "maturin develop"

[nednoodlehead]

Full error:
(venv) F:\Projects\Python Projects\punge\rust>maturin develop
🔗 Found pyo3 bindings
💥 maturin failed
Caused by: The given list of python interpreters is invalid
Caused by: Python interpreter F:\Files at random\theoretical python\punge\venv\python.exe doesn't exist

• The path that it is trying to point to is where I used to have my python project.
• As outlined on the readme, I have set "PYO3_PYTHON" and "PYTHON_SYS_EXECUTEABLE" (system and user environmental variable) to a valid python intrepreter
• The path that maturin wants to use is not listed when viewing the environment variables from windows:
  
  -But does show up in python when using "os.environ["PATH"]".
  
• Running dir env:Path in PowerShell does not show the invalid Python interpreter path for the 'Path' variable
• This is what my User and Machine variables look like:
  
  
• The "C:\Users\Spencer\AppData\Local\Programs\Python\Python310\python.exe" or "F:\Projects\Python Projects\punge\venv\Scripts" path are both valid paths.

Any help would be appreciated

[messense]

Sorry I don't have Windows environment, but I think PYO3_PYTHON should point to python.exe path rather it's directory.

[nednoodlehead]

I had originally tried having it point to the exe. Did not work. It seems to not want to use either variable.

[Skelectric]

I'm having similar issues, also on windows.

I have a python interpreter that Maturin is missing - D:\Users\[my name]\miniconda3\envs\dev\python.exe

Same as you, I added environment variables PYO3_PYTHON and PYTHON_SYS_EXECUTABLE for both user and system, which did not help.

Running maturin develop:

⚠️  Warning: Failed to determine python platform
🔗 Found pyo3 bindings
💥 maturin failed
  Caused by: The given list of python interpreters is invalid
  Caused by: Python interpreter `D:\Users\[my name]\miniconda3\envs\dev\Scripts\python.exe` doesn't exist

Why is it looking in scripts? 😔

Running maturin list-python:

🐍 1 python interpreter found:
 - CPython 3.9 at D:\Users\Phil\miniconda3\python.exe

It's only finding the interpreter in the base environment, which is the opposite of what it's supposed to be doing according to this blurb from https://github.com/PyO3/maturin#pyo3-and-rust-cpython :

On windows all versions from the python launcher (which is installed by default by the python.org installer) and all conda environments except base are used.

I was hoping that the maturin list-python --target option would help here but I can't get it to work either - which I brought up here: #957

[nednoodlehead]

I actually fixed my issue today, which was embarrassingly easy; pip reinstall maturin.

I'm not sure if it would fix your issue since my issue was more caused by moving folders around, and having that path point to a non-existent python.exe. I'm not sure if you did something similar, moving files / folders around, but one thing is consistent:

The environmental variables do not seem to matter. Maturin does not read them.