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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def init_or_migrate(self):
 """ Initialize the database or migrate if appropriate. Returns information about whether or not we initialized ('inited'), migrated ('migrated'), or did nothing (None) """

        assure_migrations_table_setup(self.session)

        # Find out what migration number, if any, this database data is at,
        # and what the latest is.
        migration_number = self.database_current_migration

        # Is this our first time?  Is there even a table entry for
        # this identifier?
        # If so:
        #  - create all tables
        #  - create record in migrations registry
        #  - print / inform the user
        #  - return 'inited'
        if migration_number is None:
            self.printer(u"-> Initializing %s... " % self.name_for_printing())

            self.init_tables()
            # auto-set at latest migration number
            self.create_new_migration_record()

            self.printer(u"done.\n")
            self.set_current_migration()
            return u'inited'

        # Run migrations, if appropriate.
        migrations_to_run = self.migrations_to_run()
        if migrations_to_run:
            self.printer(
                u'-> Updating %s:\n' % self.name_for_printing())
            for migration_number, migration_func in migrations_to_run:
                self.printer(
                    u'   + Running migration %s, "%s"... ' % (
                        migration_number, migration_func.func_name))
                migration_func(self.session)
                self.printer('done.\n')

            self.set_current_migration()
            return u'migrated'

        # Otherwise return None.  Well it would do this anyway, but
        # for clarity... ;)
        return None