A decorator to force the logging of uncatched exceptions, useful for workers with multiprocessing

log_exceptions.py

import traceback
from functools import wraps

def log_exceptions(fd):
    def _wrapped(func):
        @wraps(func)
        def _func(*args, **kwargs):
            try:
                return func(*args, **kwargs)
            except Exception:
                fd.write(traceback.format_exc())
                fd.flush()
                raise
        return _func
    return _wrapped
    
import sys
@log_exceptions(sys.stderr)
def test():
    pass