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

pytorch自定义初始化权重的方法

在常见的pytorch代码中,我们见到的初始化方式都是调用init类对每层所有参数进行初始化。但是,有时我们有些特殊需求,比如用某一层的权重取优化其它层,或者手动指定某些权重的初始值。...

解决pandas.DataFrame.fillna 填充Nan失败的问题

如果单独是 >>> df.fillna(0) >>> print(df) # 可以看到未发生改变 >>> print(d...

Python PyInstaller安装和使用教程详解

Pyinstaller这个库是我用pip下载的第一个模块。接下来通过本文给大家分享Python PyInstaller安装和使用教程,一起看看吧。 安装 PyInstalle Pytho...

使用python对excle和json互相转换的示例

python 版本:2.7 只是读取excel的话可以直接使用xlrd 1、excle to json 代码如下 # -*-coding:utf8 -*- import xlrd f...

python实现Windows电脑定时关机

定时关机,功能:windows下,用户按照一定格式输入关机时间,系统到指定时间自动关闭 思路:从用户输入获取指定时间 分别以时分秒减去当前时间 最终计算得到当前时间距离指定 时间还有多少...