混合继承

Question

我想为混合 inheritance 开发代码，但此代码不起作用。 请您向我解释错误以及如何使此代码更好。

# creating parent class
class Parent1:
    BloodGroup = 'A'
    Gender = 'Male'
    Genetic_Disease = 'Diabetes'

class Parent2:
    BloodGroup = 'B'
    Gender = 'Female'
    Genetic_Disease = 'Autism' 

    # creating child class
class Child(Parent1,Parent2): # inheriting parent class
    BloodGroup = 'A'
    Gender = 'Female'
    Genetic_Disease = 'Diabetes'
    
    def print_data():
      print(BloodGroup, Gender, Genetic_Disease)
    
# creating object for child class
child1 = Child()
# as child1 inherits it's parent's disease printed data would be it's parent's
child1.print_data()

Answer 1

您的代码不代表 inheritance 层次结构。

但是您想要表示的内容似乎遵循使用“自我”关键字的代码。

class Child(Parent2,Parent1): # inheriting parent class
    BloodGroup = 'A'
    Gender = 'Female'
    Genetic_Disease = 'Diabetes'
    
    def print_data(self):
        print(self.BloodGroup, self.Gender, self.Genetic_Disease)
    
child1 = Child()
child1.print_data()

这是使用“对象”、“继承”概念的更准确的方法。

class Person:
  hasDNA = True

class Mother(Person): # inherited parent class, Person
  def __init__(self, bloodGroup, genetic_Disease):
    self.bloodGroup = bloodGroup
    self.gender = 'Female'
    self.genetic_Disease = genetic_Disease
 
class Father(Person): # inherited parent class, Person
  def __init__(self, bloodGroup, genetic_Disease):
    self.bloodGroup = bloodGroup
    self.gender = 'Male'
    self.genetic_Disease = genetic_Disease
 
class Child(Person): # inherited parent class, Person
  def __init__(self, bloodGroup, gender, genetic_Disease):
    self.bloodGroup = bloodGroup
    self.gender = gender
    self.genetic_Disease = genetic_Disease
  
  def print_data(self):
    print(self.hasDNA, self.bloodGroup,self.gender, self.genetic_Disease)
    
father1 = Father('A', 'Diabetes')
mother1 = Mother('B', 'Autism')
child1 = Child(father1.bloodGroup, mother1.gender, father1.genetic_Disease)
child1.print_data()

Mother、Father、Child Classes 是由 Person 继承的指定类。

child1 = Child(father1.bloodGroup, mother1.gender, father1.genetic_Disease) 

上一行不是继承行为，只是将父母的信息传递给孩子。

Answer 2

一点点更正：

def print_data(self):
    print(self.BloodGroup, self.Gender, self.Genetic_Disease)

并打印 function 现在应该可以工作了。