When I run this code locally:

import subprocess

print('before')
subprocess.run(['python', 'target_script.py', 'arg1', 'arg2'])
print('after')

Output:

before
after

But when I run the same code in FastAPI…

from fastapi import FastAPI
import subprocess

app = FastAPI()

@app.get('/')
def index():
    subprocess.run(['python', 'target_script.py', 'arg1', 'arg2'])

if __name__ == '__main__':
    from uvicorn import run
    run(app, port=80)

Output: (when I start the app)

INFO:     Started server process [3568]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://127.0.0.1:80 (Press CTRL+C to quit)

Output: (when I enter the index page)

INFO:     Started server process [3568]
INFO:     Waiting for application startup.
INFO:     ASGI 'lifespan' protocol appears unsupported.
INFO:     Application startup complete.
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)

I want the process to not be related with uvicorn process.

What should I do?