Question

有人可以解释一下Django教程中选择示例末尾的函数是什么吗？

谢谢！

from django.db import model

class Student(models.Model):
    FRESHMAN = 'FR'
    SOPHOMORE = 'SO'
    JUNIOR = 'JR'
    SENIOR = 'SR'
    YEAR_IN_SCHOOL_CHOICES = (
        (FRESHMAN, 'Freshman'),
        (SOPHOMORE, 'Sophomore'),
        (JUNIOR, 'Junior'),
        (SENIOR, 'Senior'),
    )
    year_in_school = models.CharField(max_length=2,
        choices=YEAR_IN_SCHOOL_CHOICES, default=FRESHMAN)

    def is_upperclass(self):
        return self.year_in_school in (self.JUNIOR, self.SENIOR)

Answer 1

如果True的值等于False或<instance-of-class-student>.year_in_school

，则该函数将返回JR或SR

表格更多信息，以下是会员运营商的一些示例：http://www.tutorialspoint.com/python/membership_operators_example.htm

Django选择教程

1 个答案: