import os

from logging.handlers import WatchedFileHandler
import logging

handler = WatchedFileHandler('foo')

record = logging.LogRecord('foo', logging.WARN, 'foo', 25, 'foo', None, None)

os.unlink('foo')
open('foo', 'a').close()
os.chmod('foo', 0o000)
try:
    handler.emit(record)
except IOError:
    pass
os.chmod('foo', 0o644)
handler.emit(record)