python静态方法实例

yipeiwu_com6年前Python基础

本文实例讲述了python静态方法。分享给大家供大家参考。

具体实现方法如下:

复制代码 代码如下:
staticmethod Found at: __builtin__
staticmethod(function) -> method
    
    Convert a function to be a static method.
    
    A static method does not receive an implicit first argument.
    To declare a static method, use this idiom:
    
    class C:
    def f(arg1, arg2, ...): ...
    f = staticmethod(f)
    
    It can be called either on the class (e.g. C.f()) or on an
     instance
    (e.g. C().f()).  The instance is ignored except for its class.
    
    Static methods in Python are similar to those found in
     Java or C++.
    For a more advanced concept, see the classmethod builtin.
  
class Employee:
   """Employee class with static method isCrowded"""
 
   numberOfEmployees = 0  # number of Employees created
   maxEmployees = 10  # maximum number of comfortable employees
 
   def isCrowded():
      """Static method returns true if the employees are crowded"""
 
      return Employee.numberOfEmployees > Employee.maxEmployees
 
   # create static method
   isCrowded = staticmethod(isCrowded)
 
   def __init__(self, firstName, lastName):
      """Employee constructor, takes first name and last name"""
 
      self.first = firstName
      self.last = lastName
      Employee.numberOfEmployees += 1
 
   def __del__(self):
      """Employee destructor"""
 
      Employee.numberOfEmployees -= 1    
 
   def __str__(self):
      """String representation of Employee"""
 
      return "%s %s" % (self.first, self.last)
 
# main program
def main():
   answers = [ "No", "Yes" ]  # responses to isCrowded
   
   employeeList = []  # list of objects of class Employee
 
   # call static method using class
   print "Employees are crowded?",
   print answers[ Employee.isCrowded() ]
 
   print "\nCreating 11 objects of class Employee..."
 
   # create 11 objects of class Employee
   for i in range(11):
      employeeList.append(Employee("John", "Doe" + str(i)))
 
      # call static method using object
      print "Employees are crowded?",
      print answers[ employeeList[ i ].isCrowded() ]
 
   print "\nRemoving one employee..."
   del employeeList[ 0 ]
 
   print "Employees are crowded?", answers[ Employee.isCrowded() ]
 
if __name__ == "__main__":
   main()

希望本文所述对大家的Python程序设计有所帮助。

相关文章

在Django框架中伪造捕捉到的URLconf值的方法

比如说你有匹配某个模式的一堆视图,以及一个并不匹配这个模式但视图逻辑是一样的URL。 这种情况下,你可以通过向同一个视图传递额外URLconf参数来伪造URL值的捕捉。 例如,你可能有一...

Opencv+Python实现图像运动模糊和高斯模糊的示例

Opencv+Python实现图像运动模糊和高斯模糊的示例

运动模糊:由于相机和物体之间的相对运动造成的模糊,又称为动态模糊 Opencv+Python实现运动模糊,主要用到的函数是cv2.filter2D(): # coding: utf-...

Python简单定义与使用二叉树示例

本文实例讲述了Python简单定义与使用二叉树的方法。分享给大家供大家参考,具体如下: class BinaryTree: def __init__(self,rootObj):...

pandas read_excel()和to_excel()函数解析

前言 数据分析时候,需要将数据进行加载和存储,本文主要介绍和excel的交互。 read_excel() 加载函数为read_excel(),其具体参数如下。 read_exce...

python利用itertools生成密码字典并多线程撞库破解rar密码

脚本功能: 利用itertools生成密码字典(迭代器形式) 多线程并发从密码字典中取出密码进行验证 验证成功后把密码写入文件中保存 #!/usr/bin/env...