为什么下面的代码会导致错误？

Question

它适用于Employee和calculate_wage，但当我尝试创建PartTimeEmployee的实例并调用PartTimeEmployee父类的calculate_wage方法时，会返回一个错误。

class Employee(object):
     """Models real-life employees!"""
     def __init__(self, employee_name):
         self.employee_name = employee_name

     def calculate_wage(self, hours):
         self.hours = hours
         return hours * 20.00

 class PartTimeEmployee(Employee):
     def __init__(self, employee_name):
         self.employee_name = employee_name
     def calculate_wage(self, hours):
         self.hours = hours
         return hours * 12.00
     def full_time_wage(self, hours):
         return super(PartTimeEmployee, self).calculate_wage(self, hours)

 milton = PartTimeEmployee("Milton")
 print (milton.full_time_wage(10))

Answer 1

return super(PartTimeEmployee, self).calculate_wage(self, hours)

是不正确的，它应该是

return super(PartTimeEmployee, self).calculate_wage(hours)

下一次:也发布你看到的错误消息。