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正则表达式急速入门(小结)

Python正则表达式急速入门(小结)

正则表达式在程序开发中会经常用到,比如数据(格式)验证、替换字符内容以及提取字符串内容等等情况都会用到,但是目前许多开发人员对于正则表达式只是处于了解或者是基本会用的阶段。一旦遇到大批量...

详解python实现数据归一化处理的方式:(0,1)标准化

详解python实现数据归一化处理的方式:(0,1)标准化

在机器学习过程中,对数据的处理过程中,常常需要对数据进行归一化处理,下面介绍(0, 1)标准化的方式,简单的说,其功能就是将预处理的数据的数值范围按一定关系“压缩”到(0,1)的范围类。...

TensorFlow中权重的随机初始化的方法

一开始没看懂stddev是什么参数,找了一下,在tensorflow/python/ops里有random_ops,其中是这么写的: def random_normal(shape,...

Apache部署Django项目图文详解

Apache部署Django项目图文详解

前言 Django项目本身就可以启动运行,为什么还需要部署到Apache或者Nginx上呢?初学者都会遇到这个问题,我们来看看官方解释:It's intended only for us...

对tf.reduce_sum tensorflow维度上的操作详解

tensorflow中有很多在维度上的操作,本例以常用的tf.reduce_sum进行说明。官方给的api reduce_sum( input_tensor, axis=None...