Log handler based on Mailgun

mail.py

import requests
import logging

class MailHandler(logging.Handler):
    def emit(self, record):
        send_message(subject=self.__subject, text=record, toAdr=self.__toAdr, fromAdr=self.__fromAdr,
                     mailgun=self.__mailgun, mailgunkey=self.__mailgunkey)

    def __init__(self, level, format, subject, toAdr, fromAdr, mailgun, mailgunkey):
        super().__init__()
        self.level = level
        self.formatter = logging.Formatter(format)
        self.__subject = subject
        self.__mailgun = mailgun
        self.__mailgunkey = mailgunkey
        self.__toAdr = toAdr
        self.__fromAdr = fromAdr
        
def send_message(subject, text, toAdr, fromAdr, mailgun, mailgunkey, inline=None,
                 attachment=None):
    files = list()
    if attachment:
        files.extend([("attachment", (f[0], open(f[1], mode="b+r"))) for f in attachment])

    if inline:
        files.extend([("inline", (f[0], open(f[1]))) for f in inline])

    try:
        return requests.post(
            mailgun,
            auth=("api", mailgunkey),
            files=files,
            data={"from": fromAdr,
                  "to": toAdr,
                  "subject": subject,
                  "text": text}
        )
    finally:
        for f in files:
            # List of tuples ("attachment or inline", (f[0], f[1]))
            f[1][1].close()