how to send log at the end of script or when invoked? using logger module

Question

there is the logger module and SMTPHandler which when i register it sends email on every log.

is there a way to tell the SMTPHandler class to "store" the logs and only send upon called or at the end of script

Answer 1

You can write a custom handler that holds on to log records instead of emitting them directly:

import atexit
import logging


class SpoolingHandler(logging.Handler):

    def __init__(self, level, *, atexit_function) -> None:
        super().__init__(level)
        self.records = []
        if atexit_function:
            atexit.register(atexit_function, self.records)

    def handle(self, record) -> bool:
        self.records.append(record)
        return True


def send_email(records):
    print(f"Would now send an email with {len(records)} records:")
    for record in records:
        print(record)
    print("----")


def main():
    handler = SpoolingHandler(logging.INFO, atexit_function=send_email)
    logging.basicConfig(handlers=[handler], level=logging.INFO)
    logging.info("Hello")
    logging.warning("Oh no :(")


if __name__ == '__main__':
    main()

This prints out

Would now send an email with 2 records:
<LogRecord: root, 20, so73483195.py, 28, "Hello">
<LogRecord: root, 30, so73483195.py, 29, "Oh no :(">
----