why can't i see the 'print'

[CoolCaicaixian]

👆

[CoolCaicaixian]

use current_app.logger.info can see the log.
but why print can not ?

[jamescurtin]

print output to stdout is probably being buffered. In general, using the logger is the preferred option, but if printing needed, you have a few options:

1. Set the PYTHONUNBUFFERED environment variable
2. Manually flush: print("foo", flush=True)
3. Print to stderr instead of stdout, as it doesn't get buffered import sys; print("foo", file=sys.stderr)