def rename(self, name):
        """Rename self. Must be called only by its system."""
        if is_valid_name(name):
            if name not in self.system.models:
                self.name = name
                return True  # Rename success
            else:  # Model name already exists
                return False
        else:
            raise ValueError("Invalid name '%s'." % name)
def rename(self, name):
        """Rename self. Must be called only by its system."""
        if is_valid_name(name):
            if name not in self.system.models:
                self.name = name
                return True  # Rename success
            else:  # Model name already exists
                return False
        else:
            raise ValueError("Invalid name '%s'." % name)
def rename ( self , name ) : if is_valid_name ( name ) : if name not in self . system . models : self . name = name return True # Rename success else : # Model name already exists return False else : raise ValueError ( "Invalid name '%s'." % name )
Rename self. Must be called only by its system.
Rename self . Must be called only by its system .