def _header(self):
    filepath = open(self.datafilepath, 'w')
    msg = '# Model file written by *otoole*\n'
    filepath.write(msg)
    return filepath
def _header(self):
    filepath = open(self.datafilepath, 'w')
    msg = '# Model file written by *otoole*\n'
    filepath.write(msg)
    return filepath