How to call python from javascript (nodejs) program, without creating child process

Question

I have hardware running on nodejs, and I have written machine learning code in python3. I want to call python3 program from nodejs (javascript) and pass data as arguments to python program.

I have found some of the methods like using spawn, python-shell, etc. which calls python by creating a child process.

But I want to call python from the parent process itself, without creating a child process. Means, only process, that is parent nodejs process should be running.

test.py

def someFunction():
  #some code here
  #print the arguments received.

someFunction ()

test.js

call test.py from this test.js and need to pass arguments to python program as well.
call test.py with arguments as ('xyz', 'abc')

I expect the output: xyz abc

Didn't find any way to call without creating and starting child process.

Python is an interpreted language, I don't think there is a way to run uncompiled pure python code without starting an interpreter process. — holmrenser
– holmrenser, Commented Jun 20, 2019 at 9:32

Quentin · Accepted Answer · 2019-06-20 09:22:02Z

1

You can't. You're spawning an external program, that needs a process of its own.

OK, that's not entirely true. You could write a complete Python interpreter or a virtual machine (which you could run an OS in and then run Python in that) in JavaScript and then you could run it entirely within the Node.js process … but that would be a huge amount of work.

answered Jun 20, 2019 at 9:22

Quentin

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