Traceback (most recent call last):
  File "application.py", line 13, in <module>
    handler = logging.handlers.RotatingFileHandler(LOG_FILE, maxBytes=1048576, backupCount=5)
  File "/usr/local/lib/python3.4/logging/handlers.py", line 150, in __init__
    BaseRotatingHandler.__init__(self, filename, mode, encoding, delay)
  File "/usr/local/lib/python3.4/logging/handlers.py", line 57, in __init__
    logging.FileHandler.__init__(self, filename, mode, encoding, delay)
  File "/usr/local/lib/python3.4/logging/__init__.py", line 1006, in __init__
    StreamHandler.__init__(self, self._open())
  File "/usr/local/lib/python3.4/logging/__init__.py", line 1030, in _open
    return open(self.baseFilename, self.mode, encoding=self.encoding)
FileNotFoundError: [Errno 2] No such file or directory: '/opt/python/log/sample-app.log'
unable to load app 0 (mountpoint='') (callable not found or import error)