Question

基本上，这是我目前拥有的：

在script1中，我有这个：

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

在script2中，我有这个：

class Teacher(object):
    def __init__(self,name,school):
        self.name = name
        self.school = school

然后在script3中，定义实例并检查学校是否匹配：

student1=Student("Alex","Highschool")
teacher1=Teacher("Mary","Highschool")

if student1.school == teacher1.school:
    print("yes")

但是，我想结合检查学校是否在script1或script2中匹配。这是我尝试过的：

class Teacher(object):
    def __init__(self,name,school):
        self.name = name
        self.school = school
    def _check_if_school_matches(self,Student()):
        if self.school == Student.school:
            print("yes")

但是我当然得到了SyntaxError，我不能说_check_if_school_matches(self,student1)，因为student1尚未定义。

Answer 1

您不需要在该方法的参数列表中创建Student的新实例。将其更改为：

def _check_if_school_matches(self, student):
    if self.school == student.school:
        print("yes")

现在，如果您使用teacher1实例在student1上调用该方法，它将显示“是”

student1=Student("Alex", "Highschool")
teacher1=Teacher("Mary", "Highschool")

teacher1._check_if_school_matches(student1) # yes

What is duck typing?

在新类中，如何避免调用另一个类的实例？

1 个答案: