Python中的类

    俗话说，物以类聚，人以群分，类是什么，类就是一组相同属性的集合。下面来结合人，探讨Python中类和人类的关系。

    首先，我们定义一个人的类，如下：

class People(object):
    '''创建人类'''

    def __init__(self,name,age,sex,blood_type):
        """人具有姓名，年龄，性别，血型的属性"""
        self.name = name
        self.age = age
        self.sex = sex
        self.blood_type = blood_type
        
    def walk(self):
        '''创建走路方法'''
        print("%s can walk!!!!" %self.name)
        
    def speak(self):
        """创建说话的属性"""
        print("%s can speak!!" %self.name)
        
    def learn(self):
        '''创建学习的属性'''
        print("%s is learning." %self.name)


p1 = People("wupeiqi",18,"女","0")
p2 = People("Alex",8,"男","AB")

    上面代码中，我们定义了一个人的类，人都有姓名，年龄，性别，血型等属性，还有说话，学习，走路等方法；并且我们创建了两个人，一男一女，"Wupeiqi"和"Alex"，下面我们来一步一步完善这两个人。

    我们知道，男人有喉结，女人会生小孩，这两个是男，女的区别，也是各自独有的属性。那么给"wupeiqi"和"Alex"添加这种属性。如下：

class People(object):
    '''创建人类'''

    def __init__(self,name,age,sex,blood_type):
        """人具有姓名，年龄，性别，血型的属性"""
        self.name = name
        self.age = age
        self.sex = sex
        self.blood_type = blood_type

    def walk(self):
        '''创建走路方法'''
        print("%s can walk!!!!" %self.name)

    def speak(self):
        """创建说话的属性"""
        print("%s can speak!!" %self.name)

    def learn(self):
        '''创建学习的属性'''
        print("%s is learning." %self.name)


p1 = People("wupeiqi",18,"女","0")
p2 = People("Alex",8,"男","AB")
p1.birth = "Woman can give birth to a baby"    #给女人添加生孩子功能
p2.adam = "Man has Adam's apple"               #给男人添加喉结属性

    我们知道，男人和女人都有学习的功能，我们人类自己有人会说英语，有人会说日语，总之各种各样的语言，这些是个体所具有的属性，比如"wupeiqi"会说日语，"Alex"会说英语，我们来实现一下：

class People(object):
    '''创建人类'''

    def __init__(self,name,age,sex,blood_type):
        """人具有姓名，年龄，性别，血型的属性"""
        self.name = name
        self.age = age
        self.sex = sex
        self.blood_type = blood_type

    def walk(self):
        '''创建走路方法'''
        print("%s can walk!!!!" %self.name)

    def speak(self):
        """创建说话的属性"""
        print("%s can speak!!" %self.name)

    def learn(self):
        '''创建学习的属性'''
        print("%s is learning." %self.name)


p1 = People("wupeiqi",18,"女","0")
p2 = People("Alex",8,"男","AB")
p1.birth = "Woman can give birth to a baby"    #给女人添加生孩子功能
p2.adam = "Man has Adam's apple"               #给男人添加喉结属性
p1.language1 = "Japanese"
p2.language2 = "English"

print("{0} is can speak {1}".format(p1.name,p1.language1))   #打印wupeiqi说的语言
print("{0} is can speak {1}".format(p2.name,p2.language2))   #打印ALex说的语言
print("%s is can speak %s" %(p1.name,p1.language2))          #看wupeiqi是否会说英语
print("%s is can speak %s" %(p2.name,p2.language1))          #查看Alex是否会说日语   主要是看语言能力能否交叉
运行结果如下：
wupeiqi is can speak Japanese
Alex is can speak English
Traceback (most recent call last):
  File "/home/zhuzhu/第七天/人类.py", line 33, in <module>
    print("%s is can speak %s"