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

Python 调用DLL操作抄表机

# -*- coding: GBK -*- from ctypes import * dll = windll.LoadLibrary('JBA188.dll') a = dll.tes...

python调用pyaudio使用麦克风录制wav声音文件的教程

python的pyaudio可以进行录音,播放,生成wav文件等等,WAVE是录音时用的标准的WINDOWS文件格式,文件的扩展名为WAV,数据本身的格式为PCM或压缩型,属于无损音乐格...

详解Python中的循环语句的用法

一、简介       Python的条件和循环语句,决定了程序的控制流程,体现结构的多样性。须重要理解,if、while、for以及与它...

django配置连接数据库及原生sql语句的使用方法

前言 本文主要给大家介绍了关于django配置连接数据库及原生sql语句的相关内容,分享出来供大家参考学习,下面话不多说了,来一起看看详细的介绍吧 Django配置连接数据库: 在操作...

实例说明Python中比较运算符的使用

实例说明Python中比较运算符的使用

下表列出了所有Python语言支持的比较操作符。假设变量a持有10和变量b持有20,则:  例如: 试试下面的例子就明白了所有的Python编程语言提供的比较操作符:...