docker log don't show python print output

Question

I have a Django Proj running in Docker Container

My Debug=True

but docker up logging doesn't show any print('xxxx') output.

Is there a way to fix it? thanks!

Answer 1

After a long search I found this https://serverfault.com/a/940357

Add flush=True

print(datetime.now(), flush=True)

Or add PYTHONUNBUFFERED: 1 to docker-compose.yml which is added by PyCharm by default

version: '3.6'

services:

  test:
    ....
    environment:
      PYTHONUNBUFFERED: 1  # <---
    ....