swiftly/cli/optionparser.py
def error(self, msg, file=None):
        """
        Outputs the error msg to the file if specified, or to the
        io_manager's stderr if available, or to sys.stderr.
        """
        self.error_encountered = True
        file.write(self.error_prefix)
        file.write(msg)
        file.write('\n')
        file.flush()
def error(self, msg, file=None):
        self.error_encountered = True
        file.write(self.error_prefix)
        file.write(msg)
        file.write('\n')
        file.flush()
def error ( self , msg , file = None ) : self . error_encountered = True file . write ( self . error_prefix ) file . write ( msg ) file . write ( '\n' ) file . flush ( )
Outputs the error msg to the file if specified, or to the
        io_manager's stderr if available, or to sys.stderr.
Outputs the error msg to the file if specified or to the io_manager s stderr if available or to sys . stderr .