Save the list of tools to AIKIF core and optionally to local file fname

def save(self, fname=''):
        """
        Save the list of tools to AIKIF core and optionally to local file fname
        """
        if fname != '':
            with open(fname, 'w') as f:
                for t in self.lstTools:
                    self.verify(t)
                    f.write(self.tool_as_string(t))