Python. Catching error without try... except

Question

So I build a small logger class that logs everything but there is a small issue with it.
Then some kind of exception/error happens outside of try... except block I don't have a way to log it into a file.
So the question is, how to catch errors out side of try... except block.
Also if there someone saying "Put whole program in try except.", well here is the problem that it completely ignores errors happening in threads and subprocesses. Example:

from datetime import datetime
import logging


class Msg:
    def __init__(self, logger_name, path, conn=None, info_format="utf-8", file_name=None):
        self.path = path
        self.logger = logging.getLogger(logger_name)
        self.logger.setLevel(logging.DEBUG)
        self.now = datetime.now()
        self.now = self.now.strftime("%d_%m_%Y-%H_%M_%S")
        self.file_formatter = logging.Formatter("%(asctime)s:%(levelname)s:%(message)s")
        if file_name is not None:
            self.now = file_name
        self.file_handler = logging.FileHandler(f"{self.path}/{self.now}.log")
        self.file_handler.setLevel(logging.DEBUG)
        self.file_handler.setFormatter(self.file_formatter)
        self.stream_formatter = logging.Formatter("%(levelname)s:%(message)s")
        self.stream_handler = logging.StreamHandler()
        self.stream_handler.setFormatter(self.stream_formatter)
        self.logger.addHandler(self.stream_handler)
        self.logger.addHandler(self.file_handler)
        
    def debug(self, message):
        self.logger.debug(message)

    def info(self, message):
        self.logger.info(message)

    def warning(self, message):
        self.logger.warning(message)

    def error(self, message):  # Somehow any exception outside try except have to trigger this to be logged or any other function.
        self.logger.error(message, exc_info=True)

    def critical(self, message):
        self.logger.critical(message, exc_info=True)


if __name__ == "__main__":
    log = Msg("Example_Logger_Name", ".")|
    a = 1/0  # an example error