<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def checkAndCreateClasses(self, classes):
 """ Function checkAndCreateClasses Check and add puppet class @param classes: The classes ids list @return RETURN: boolean """

        actual_classes = self['puppetclasses'].keys()
        for i in classes:
            if i not in actual_classes:
                self['puppetclasses'].append(i)
        self.reload()
        return set(classes).issubset(set((self['puppetclasses'].keys())))