How to fix "Error: spawn py ENOENT" error when running python script from electron app?

Question

I was trying to run some python script from electron app in windows 10.The sample code that I am trying to run is:

let {PythonShell} = require('python-shell')
PythonShell.run('test.py',  function  (err, results)  {
 if  (err)  throw err;
 console.log('test.py finished.');
 console.log('results', results);
});

The code is expected to run test.py which contains a simple print statement.But the terminal shows the following error log:

throw er; // Unhandled 'error' event
      ^

Error: spawn py ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:240:19)
    at onErrorNT (internal/child_process.js:415:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
    at Function.Module.runMain (internal/modules/cjs/loader.js:745:11)
    at startup (internal/bootstrap/node.js:283:19)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:743:3)
Emitted 'error' event at:
    at Process.ChildProcess._handle.onexit (internal/child_process.js:246:12)
    at onErrorNT (internal/child_process.js:415:16)
    [... lines matching original stack trace ...]
    at bootstrapNodeJSCore (internal/bootstrap/node.js:743:3)

Possible duplicate of [How do I debug "Error: spawn ENOENT" on node.js?](https://stackoverflow.com/questions/27688804/how-do-i-debug-error-spawn-enoent-on-node-js) — Bilal Siddiqui, Oct 15 '19 at 09:01

score 2 · Answer 1 · answered Oct 15 '19 at 16:51

2

Looks like the Python executable is not available from your node script, which is almost always the case in Windows. Either add the python executable to your PATH variable, or specify the executable path in the options. See constructor options for more details.

Use https://github.com/extrabacon/python-shell#pythonshellscript-options-constructor

Set pythonPath & try.

let options = {
    pythonPath: 'C:\\python27\\python',
  };

  let {PythonShell} = require('python-shell')
  PythonShell.run('test.py', options,  function  (err, results)  {
   if  (err)  throw err;
   console.log('test.py finished.');
   console.log('results', results);
  });

https://github.com/extrabacon/python-shell/issues/3#issuecomment-52174564

answered Oct 15 '19 at 16:51

Sudhakar Ramasamy

1,736
1
8
19

1

Thanks for your response. I updated my path variable and also included the path to python executable in options. But this error is still there.. – Iftekhar Jamil Oct 15 '19 at 18:30
@IftekharJamil What do you have in 'test.py'? – Sudhakar Ramasamy Oct 16 '19 at 02:06
It contains just a print statement: `import sys print("Hello world")` – Iftekhar Jamil Oct 16 '19 at 05:57

Niccanor Dhas · Answer 2 · 2022-06-08T05:18:59.563

0

For Mac

install python 2.7 from python site.
copy the directory “/Library/Frameworks/Python.framework/Versions/2.7/Resources/Python.app/Contents/MacOS/Python”
open node modules and 'dmg builder' folder and 'dmg.js' file replace “/usr/bin/python”.

still same error --->

upgrade the electron build "yarn add electron-builder --dev"

I used child process, I'm not sure this will work on python-shell

edited Jun 08 '22 at 05:18

answered Jun 08 '22 at 05:18

Niccanor Dhas

1
2

1

As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Jun 08 '22 at 05:40

How to fix "Error: spawn py ENOENT" error when running python script from electron app?

2 Answers2