Python “print” does not log to Forever.js Logs

Question

A Python 2.7 script outputs some debug info via print as it runs.

....
print datetime.now()
...

This script is started by forever.js :

forever start -c python myPrintingScript.py

However when I want to check the output of the Python script, nothing shows up in the logs.

Running forever logs 0 returns nothing. But the script definitely is running and has not crashed/restarted.

Question: Is there a way to get the Python script to print debug info such that it also appears in the log files of forever ?

Answer 1

You can specify output logs for forever

-l  LOGFILE      Logs the forever output to LOGFILE
-o  OUTFILE      Logs stdout from child script to OUTFILE
-e  ERRFILE      Logs stderr from child script to ERRFILE

For example:

forever -o out.log -e err.log myPrintingScript.py

Answer 2

Please do as this:

import sys
print "xxxx"
sys.stdout.flush()

Then you will see xxxx in the log file that forever created.