NodeJS：在 conda 环境中运行 python 脚本

Question

I have a lots of python scripts and each has own dependency.
And I create conda environment to each python script and install dependency too.

And I tried many ways like below

Tried 1

const childProcess = require('child_process');

const pythonScript = 'test.py';
const environmentName = 'test';

const command = [
  `conda activate ${environmentName}`,
  `python ${pythonScript}`
]
  .map(v => `(${v})`)
  .join(' && ');

const pythonProcess = childProcess.spwan(command, { shell: true });

pythonProcess.stdin.on('data', (data) => console.log(data.toString()));
pythonProcess.stderr.on('data', (data) => console.error(data.toString()));

pythonProcess.on('close', (code) => {
  console.log('Process Exited:', code);
});

Tried 2

const command = [
  `conda activate ${environmentName}`,
  `python ${pythonScript}`
]
  .map(v => `(${v})`)
  .join(' && ');

const pythonProcess = childProcess.spwan(`bash -lc "${command}"`, { shell: true });

Tried 3

const command = [
  `source /opt/conda/etc/profile.d/conda.sh`,
  `conda activate ${environmentName}`,
  `python ${pythonScript}`
]
  .map(v => `(${v})`)
  .join(' && ');

const pythonProcess = childProcess.spwan(`bash -lc "${command}"`, { shell: true });

But, in python script, conda environment doesn't enabled (just enabled default conda environemnt).

How can I run python script in specific conda environment in nodejs?

Answer 1

The conda activate command is a shell function, not a true CLI, so it's not available without first launching a shell in interactive mode (assuming you have previously run conda init ). Try using conda run instead. In your first example, I think it would be something like

const command = `conda run -n ${environmentName} python ${pythonScript}`

This enables one to execute commands in an environment without having to manually activate the environment.