Problem with spawning a python3 process on Windows

I have 0 experience with Windows Elixir and Python.

You cmd line example calls python but the error calls python3.exe. Are you sure the file name is correct and exists at that path?

My bad, sorry! Either way, both python3 and python output the same result

$ python3 -V
Python 3.10.2

$ python -V
Python 3.10.2

python3.exe does exist inside the folder and even outputs the same result

$ c:\\Users\\Jiri\\AppData\\Local\\Microsoft\\WindowsApps\\python3.exe -V
Python 3.10.2

I’m honestly confused why it’s not working.
I can’t even run python calling

:erlang.open_port({:spawn, 'python -V'}, [{:line, 80}, :stderr_to_stdout, :hide])
 or
:erlang.open_port({:spawn, 'python3 -V'}, [{:line, 80}, :stderr_to_stdout, :hide]) 

There may be a $PATH issue.

Have you tried?

path = "C:\\Users\\Jiri\\AppData\\Local\\Microsoft\\WindowsApps\\python3.exe"
Port.open({:spawn_executable, path}, [:binary, args: ["-V"]])

This solution does not work, either.

C:\Users\Jiri>iex
Interactive Elixir (1.13.3) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> path = "C:\\Users\\Jiri\\AppData\\Local\\Microsoft\\WindowsApps\\python3.exe"
"C:\\Users\\Jiri\\AppData\\Local\\Microsoft\\WindowsApps\\python3.exe"
iex(2)> Port.open({:spawn_executable, path}, [:binary, args: ["-V"]])
** (ErlangError) Erlang error: :enoent
    erlang.erl:2217: :erlang.open_port({:spawn_executable, "C:\\Users\\Jiri\\AppData\\Local\\Microsoft\\WindowsApps\\python3.exe"}, [:binary, {:args, ["-V"]}])
iex(2)>

Curious. And what do you get from System.find_executable("python") as per `'Port - spawn_executable docs?

The output is following

iex(2)> System.find_executable("python")
"c:/Users/Jiri/AppData/Local/Microsoft/WindowsApps/python.exe"

Ah ok I see, try to use that output.

path = System.find_executable("python")
Port.open({:spawn_executable, path}, [:binary, args: ["-V"]])

I think it was my fault for misunderstanding the way erlang output the path name vs. elixir.

Environment variable ERLPORT_PYTHON can be set to python interpreter path. ErlPort tries to pick up from this env variable by default.

Sadly, no luck. It gives the same error.

iex(1)> path = System.find_executable("python")
"c:/Users/Jiri/AppData/Local/Microsoft/WindowsApps/python.exe"
iex(2)> Port.open({:spawn_executable, path}, [:binary, args: ["-V"]])
** (ErlangError) Erlang error: :enoent
    erlang.erl:2217: :erlang.open_port({:spawn_executable, "c:/Users/Jiri/AppData/Local/Microsoft/WindowsApps/python.exe"}, [:binary, {:args, ["-V"]}])

It may be a dumb question, but how can I change the path?
However, even the current path points to a valid path.