docs: def log_level(level_string):
  	"""
  	Return a log level for a string
  
  	>>> log_level('DEBUG') == logging.DEBUG
  	True
  	>>> log_level('30') == logging.WARNING
  	True
  	"""
  	if level_string.isdigit():
  		return int(level_string)
  	return getattr(logging, level_string.upper())