def unwatch_from_file(connection, file_name):
with open(file_name, '<STR_LIT:r>') as filehandle:<EOL><INDENT>for line in filehandle.xreadlines():<EOL><INDENT>volume, interval, retention = line.rstrip().split('<STR_LIT:U+002C>')<EOL>unwatch(connection, get_volume_id(connection, volume))<EOL><DEDENT><DEDENT>
Start watching a new volume

    :type connection: boto.ec2.connection.EC2Connection
    :param connection: EC2 connection object
    :type file_name: str
    :param file_name: path to config file
    :returns: None