Python基础类与继承学习

#类
class CocaCola:
    formula = ['caffeine','sugar','water','soda']
    def drink(self):
        print('Energy!')
coke = CocaCola()
coke.drink()

print('\n')

#self
class Coca:
    formula = ['caffeine','sugar','water','soda']
    def drink(coke):    # 把self改为coke
        print('Energy!')
coke = Coca()
coke.drink()

print('\n')

#魔术方法
class CocaCo():
    formula = ['caffeine','sugar','water','soda']
    def __init__(self):
        self.local_logo = '可口可乐'
    def drink(self): 
        print('Energy!')
coke = CocaCo()
print(coke.local_logo)

print('\n')

#父类
class People(object):
    #初始化函数
    def __init__(self,name,age,weight):
        self.name =name
        self.age =age
        self.weight = weight
    #对象函数
    def sleep(self):
        print('这是People类中的sleep函数')
    #根据工作时间，计算体重是否减少的功能函数
    def work_time(self,time):
        #如果工作时间在8-12小时范围，体重-2斤
        #如果超过12小时，体重-5斤
        if 8<time<=12:
            self.weight -= 2
        elif time>12:
            self.weight -= 5
 
 
#声明Man类，继承自People类
class Man(People):
    def __init__(self,name,age,sex,weight,height):
        #调用父类的初始化，将父类的属性进行初始化，并且将self对象作为参数传递到父类的初始化函数中
        super(Man,self).__init__(name,age,weight)
        #初始化当前类拥有的属性
        self.sex = sex
        self.height = height
    def drink(self):
        print('这人光喝酒')
    def sleep(self):
        #在这个sleep函数中，可以执行和父类中完全不同的功能
        print('这是Man类中的sleep函数')
    #2.重写work_time函数
    def work_time(self,time):
        #2.1根据时间计算体重
        super(Man,self).work_time(time)
        #2.2根据体重判断身材
        #身高-105 = 体重  身材标准
        #身高-105 > 体重 身材偏瘦
        #身高-105 > 体重 身材偏胖
        result = self.height-105
        if result>self.weight:
            print('偏瘦')
        elif result<self.weight:
            print('偏胖')
        else:
            print('标准')
 
 
#创建People对象p1
p1 = People('张三',22,170)
p1.sleep()
p1.work_time(13)
print('p1工作之后的体重：%s'%p1.weight)
# 父类不能调用子类的函数
# p1.drink()
#创建Man类对象
m = Man('李四',22,'男',70,190)
m.sleep()
#m在执行work_time时，除了计算体重还要判断身材是否标准
m.work_time(13)
print('m工作之后的体重：%s'%m.weight)
print(m.name)
print(m.age)
print(m.sex)

print('\n')

#多继承
class Base(object):
    def __init__(self):
        print("base_init")

class A(Base):
    def __init__(self):
        print('start_A')
        # Base.__init__(self)
        super(A, self).__init__()
        print('finish_A')

class B(Base):
    def __init__(self):
        print('start_B')
        # Base.__init__(self)
        super(B, self).__init__()
        print('finish_B')

class C(A,B):
    pass

c = C();


print('\n')

class Base(object):
    def __init__(self):
        print("base_init")

class A(Base):
    def __init__(self):
        print('start_A')
        # Base.__init__(self)
        super(A, self).__init__()
        print('finish_A')

class B(object):
    def __init__(self):
        print('start_B')
        # Base.__init__(self)
        super(B, self).__init__()
        print('finish_B')

class C(A,B):
    pass

c = C();