Python 3.9 logger RotatingLogger doesn’t write anything into file

I created a simple demo to test my Django project. when i invoke unittest, everything passed and i set logger.info to record log into debug.log. There should be some records appeared in my target file but nothing in it. here is my Logger.py import logging.config import os fmt = "%(asctime)s|%(levelname)s|%(filename)s:%(lineno)d|%(message)s" datefmt = "%Y-%m-%d %H:%M:%S" # … Read more

live output from subprocess command

I’m using a python script as a driver for a hydrodynamics code. When it comes time to run the simulation, I use subprocess.Popen to run the code, collect the output from stdout and stderr into a subprocess.PIPE — then I can print (and save to a log-file) the output information, and check for any errors. The problem is, I have no idea how the code is progressing. If I run it directly from the command line, it gives me output about what iteration its at, what time, what the next time-step is, etc.