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

对Python2与Python3中__bool__方法的差异详解

学习Python面向对象编程的时候,遇到了一个很有意思的小问题。Python的__bool__方法不起作用的问题。 我反复读了我手中的教程,确认了我写的代码应该管用。可是在测试的时候却一...

Python tkinter模块弹出窗口及传值回到主窗口操作详解

Python tkinter模块弹出窗口及传值回到主窗口操作详解

本文实例讲述了Python tkinter模块弹出窗口及传值回到主窗口操作。分享给大家供大家参考,具体如下: 有些时候,我们需要使用弹出窗口,对程序的运行参数进行设置。有两种选择 一、标...

PyQt5 多窗口连接实例

PyQt5 多窗口连接实例

前言 之前做过pyqt的一个简单界面,在一个窗口(MainWindow)中实现一些操作;之前嫌麻烦没有去做多窗口和它们的切换功能。最近研究了下窗口的调用和切换。 pyqt4和5有很多不同...

从零学python系列之教你如何根据图片生成字符画

从零学python系列之教你如何根据图片生成字符画

说下思路吧: 原图->灰度->根据像素亮度-映射到指定的字符序列中->输出。字符越多,字符变化稠密。效果会更好。如果根据灰度图的像素亮度范围制作字符画,效果会更好。如果...

python3正则提取字符串里的中文实例

python3正则提取字符串里的中文实例

如下所示: # -*- coding: utf-8 -*- import re #过滤掉除了中文以外的字符 str = "hello,world!!%[545]你好234世界。。。"...