经典类和新式类

经典类：  class People:
新式类：  class People(object):

区别主要体现在多继承上构造函数顺序问题：

 

python2:
　　经典类是按深度优先来继承的，新式类按广度优先来继承的
 
python3:
　　都是按照广度优先来继承

 
多继承：

class People(object):
　　def __init__(self, name, age):
　　　　self.name = name
　　　　self.age = age
　　def eat(self):
　　　　print("%s is eating ...." % self.name)
 
class Relation(object):
　　def make_friend(self, obj):
　　　　print("%s make friend with %s" % (self.name, obj.name))
 
class Men(People, Relation):
　　def __init__(self, name, age, momey):
　　　　#People.__init__(self, name, age)
　　　　super(Men, self).__init__(name, age)
　　　　self.momey = momey
　　def sleep(self):
　　　　print("%s is sleeping" % self.name)
 
 class Wemen(People, Relation):
　　def xx(self):
　　　　print("===================")
 
 t1 = Men("Brace", 29, 23)
 t2 = Wemen("Lucy", 29)
 
 t1.make_friend(t2)

 输出：
 Brace make friend with Lucy 

 
 class People(object):
　　def __init__(self, name, age):
　　　　self.name = name
　　　　self.age = age
　　　　self.friends=[]
　　def eat(self):
　　　　print("%s is eating ...." % self.name)
 
class Relation(object):
　　def make_friend(self, obj):
　　　　print("%s make friend with %s" % (self.name, obj.name))
　　　　self.friends.append(obj)
 
 class Men(People, Relation):
　　def __init__(self, name, age, momey):
　　　　#People.__init__(self, name, age)
　　　　super(Men, self).__init__(name, age)
　　　　self.momey = momey
def sleep(self):
　　　　print("%s is sleeping" % self.name)
 
class Wemen(People, Relation):
　　def xx(self):
　　　　print("===================")
 
 t1 = Men("Brace", 29, 30)
 #t1.sleep()
 #print(t1.momey)
 t2 = Wemen("Lucy", 29)
 
 t1.make_friend(t2)
 t2.name = "Kitty"
 print(t1.friends[0].name)
 
 输出：
 Brace make friend with Lucy
 Kitty
 
 
案例：
 学校，讲师，学员

 
 class School(object):
  def __init__(self, name, addr):
   self.name = name
   self.addr = addr
   self.students = []
   self.staffs = []
  def entrool(self, stu_obj):
   print("为学员  %s 办理注册登记手续" % stu_obj.name)
   self.students.append(stu_obj)
 
  def hire(self, staff_obj):
   print("%s 被雇佣为学校 %s 老师" % (staff_obj.name, self.name))
   self.staffs.append(staff_obj)
 
 class Schoolmembers(object):
  def __init__(self, name, age, gender):
   self.name = name
   self.age = age
   self.gender = gender
  def tell(self):
   pass
 
 class Teachers(Schoolmembers):
  def __init__(self, name, age, gender, salary, course):
   super(Teachers,self).__init__(name, age, gender)
   self.salary = salary
   self.course = course
 
  def tell(self):
   print("""
   ======info of teacher: %s ========
   name: %s
   age: %s
   gender: %s
   Salary: %s
   Course；%s
   """ % (self.name, self.name, self.age, self.gender, self.salary, self.course))
 
  def teach(self):
   print("%s is teaching course [%s]" %(self.name, self.course))
 
 class Students(Schoolmembers):
  def __init__(self, name, age, gender, stu_id, grade):
   super(Students, self).__init__(name, age, gender)
   self.stu_id = stu_id
   self.grade = grade
  def tell(self):
   print("""
   ======info of student: %s ========
   name: %s
   age: %s
   gender: %s
   stu_id: %s
   grade；%s
   """ % (self.name, self.name, self.age, self.gender, self.stu_id, self.grade))
 
  def pay_tuition(self, amount):
   print("%s has pay tution for $ %d" % (self.name, amount))
 
 school = School("惊风学院", "北京朝阳区")
 t1 = Teachers("Brace", 23, "Male", 20000, "Linux")
 t2 = Teachers("Lucy", 25, "Female", 10000, "Python")
 
 s1 = Students("Zhangsan",18, "male","10001", "python")
 s2 = Students("Lisi",16, "female","10002", "Linux")
 
 
 t1.tell()
 s1.tell()
 t2.tell()
 s2.tell()
 
 school.entrool(s1)
 school.hire(t1)
 school.entrool(s2)
 school.hire(t2)
 
 print(school.students)
 print(school.staffs)
 
 school.staffs[0].teach()
 
 for stu in school.students:
  stu.pay_tuition(5000)
 

 输出：
   ======info of teacher: Brace ========
   name: Brace
   age: 23
   gender: Male
   Salary: 20000
   Course；Linux
   
 
   ======info of student: Zhangsan ========
   name: Zhangsan
   age: 18
   gender: male
   stu_id: 10001
   grade；python
   
 
   ======info of teacher: Lucy ========
   name: Lucy
   age: 25
   gender: Female
   Salary: 10000
   Course；Python
   
 
   ======info of student: Lisi ========
   name: Lisi
   age: 16
   gender: female
   stu_id: 10002
   grade；Linux
   
   为学员  Zhangsan 办理注册登记手续
   Brace 被雇佣为学校 惊风学院 老师
   为学员  Lisi 办理注册登记手续
   Lucy 被雇佣为学校 惊风学院 老师
   [<__main__.Students object at 0x03B7CED0>, <__main__.Students object at 0x03B7CEF0>]
   [<__main__.Teachers object at 0x03B7CE90>, <__main__.Teachers object at 0x03B7CEB0>]
   Brace is teaching course [Linux]
   Zhangsan has pay tution for $ 5000
   Lisi has pay tution for $ 5000