django test模块

今天试了试django自带的test模块，断点执行到一下代码中时发现一点儿小问题：

 def _create_test_db(self, verbosity, autoclobber):
        """
        Internal implementation - creates the test db tables.
        """
        suffix = self.sql_table_creation_suffix()

        test_database_name = self._get_test_db_name()

        qn = self.connection.ops.quote_name

        # Create the test database and connect to it. We need to autocommit
        # if the database supports it because PostgreSQL doesn't allow
        # CREATE/DROP DATABASE statements within transactions.
        cursor = self.connection.cursor()
        self._prepare_for_test_db_ddl()
        try:
            cursor.execute(
                "CREATE DATABASE %s %s" % (qn(test_database_name), suffix))
        except Exception as e:
            sys.stderr.write(
                "Got an error creating the test database: %s\n" % e)
            if not autoclobber:
                confirm = input(
                    "Type 'yes' if you would like to try deleting the test "
                    "database '%s', or 'no' to cancel: " % test_database_name)
            if autoclobber or confirm == 'yes':
                try:
                    if verbosity >= 1:
                        print("Destroying old test database '%s'..."
                              % self.connection.alias)
                    cursor.execute(
                        "DROP DATABASE %s" % qn(test_database_name))
                    cursor.execute(
                        "CREATE DATABASE %s %s" % (qn(test_database_name),
                                                   suffix))
                except Exception as e:
                    sys.stderr.write(
                        "Got an error recreating the test database: %s\n" % e)
                    sys.exit(2)
            else:
                print("Tests cancelled.")
                sys.exit(1)

        return test_database_name

有问题的代码在于，confirm根本无法从dos输入获得‘yes’,因为输入后，会将换行符'\r'也读进去。因此，无论输入yes 还是cancel，都会走到线面的else分支，

print("Tests cancelled.")
sys.exit(1)





改掉代码后，正确执行，销毁旧的database，新建了test database。