Python中类的创建和实例化操作示例

# coding: utf-8# 创建一个类，类名称第一个字母大写,可以带括号也可以不带括号class Student(): student_count = 0 def __init__(self, name, salary):  self.name = name  self.age = salary  Student.student_count += 1 def display_count(self):  print('Total student {}'.format(Student.student_count)) def display_student(self):  print('Name: {}, age: {}'.format(self.name,self.age)) def get_class(self):  if self.age >= 7 and self.age < 8:   return 1  if self.age >= 8 and self.age < 9:   return 2  if self.age >= 9 and self.age < 10:   return 3  if self.age >= 10 and self.age < 11:   return 4  else:   return 0# 创建类的对象（实例化类）# python中实例化类不需要使用关键字new（也没有这个关键字），类的实例化类似函数调用方式。student1 = Student('cuiyongyuan',10)student2 = Student('yuanli', 10)student1.display_student()student2.display_student()student1_class = student1.get_class()student2_class = student2.get_class()