A function to use to make sure that tracebacks are logged.

excepthook.py

def excepthook(*exc_info):
    """Log the traceback if program throws an unhandled exception."""
    exc_type, exc_value, exc_traceback = exc_info
    exc_time = time.time()
    msg = f"{exc_type.__name__} @ {exc_time}"
    logging.critical(f"{msg}. Traceback ↓", exc_info=exc_info)
    logging.critical(f"{msg}. Traceback ↑")

sys.excepthook = excepthook

Creates output in logs like this:

2025-07-17 12:23:49,018 INFO yadda
2025-07-17 12:23:49,018 INFO yadda
2025-07-17 12:23:49,018 CRITICAL ValueError @ 1752773029.0184488. Traceback ↓
Traceback (most recent call last):
  File "/Users/stringertheory/Desktop/testing_excepthook.py", line 24, in <module>
    raise ValueError("nope")
ValueError: nope
2025-07-17 12:23:49,020 CRITICAL ValueError @ 1752773029.0184488. Traceback ↑

The timestamp is in the log message at the beginning and end of the traceback, so that it's easy to search for the beginning/end of the traceback when reading the logfile.