题目说是避免字符串，那稍微改下测试代码吧，不然枚举在这个题中没什么用！

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

from enum import Enum, unique

class Gender(Enum):
    Male = 0
    Female = 1

class Student(object):
    def __init__(self, name, gender):
        self.name = name
        self.gender = gender

# 测试:
bart = Student('Bart', Gender(0))
if bart.gender == Gender.Male:
    print('测试通过!')
else:
    print('测试失败!')