解析python 类方法、对象方法、静态方法

# -*- coding:utf-8 -*-
#!/usr/bin/python
# Filename: method.py

class Person:
grade=1
def __init__(self,name):
self.name = name
def sayHi(self):#加self区别于普通函数
print 'Hello, your name is?',self.name

@staticmethod #声明静态，去掉则编译报错;还有静态方法不能访问类变量和实例变量
def sayName():#使用了静态方法，则不能再使用self
print "my name is king"#,grade,#self.name

@classmethod #类方法
def classMethod(cls):
print("class method")

p = Person("king")
p.sayHi()
p.sayName()
p.classMethod()
Person.classMethod()

class Student(object):
 @staticmethod
 def aver_age(x, y):
  return x + y

 def year(self):
  return self.aver_age(self.month, self.day)

Student().year is Student().year
Student().aver_age is Student().aver_age
Student().aver_age is Student.aver_age
False
True
True

class Dog(object):
 food = "gutou"
 age = "1"
 def __init__(self, name):
  self.NAME = name
 @classmethod
 def eat(self,age): #只能是类中的变量
  # print(self.NAME)
  print(age)
  print(self.food)

 @classmethod
 def eat1(self, age): # 只能是类中的变量
  # print(self.NAME)
  age = "2"
  self.food = "tang"
 @staticmethod
 def print_1():
  print(Dog.food, Dog.age)

d = Dog("labuladuo")
d.eat(Dog.age) #通过对象调用
Dog.eat(Dog.age) #通过类调用
print("-----1-----")
d.eat1(Dog.age)
Dog.print_1()
print("--------2-------")
Dog.eat1(Dog.age)
Dog.print_1()