Linux SRV-16 6.18.44-paas #1 SMP PREEMPT_DYNAMIC Thu Aug 13 10:08:12 UTC 2026 x86_64

//opt/python-3.8.0-202012151422/usr/lib/python3.8/test/test_asyncio/echo.py

 import os

if __name__ == '__main__':
    while True:
        buf = os.read(0, 1024)
        if not buf:
            break
        os.write(1, buf)