python静态方法实例

yipeiwu_com5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

创建pycharm的自定义python模板方法

在pycharm上依次选择打开File->settings->Editor->File andCode Templates->Python Script 复制以下...

python 中pyqt5 树节点点击实现多窗口切换问题

python 中pyqt5 树节点点击实现多窗口切换问题

下面通过实例代码给大家介绍python 中pyqt5 树节点点击实现多窗口切换问题,具体代码如下所示: # coding=utf-8 import sys from PyQt5.Qt...

Python实现简单的可逆加密程序实例

本文实例讲述了Python实现简单的可逆加密程序。分享给大家供大家参考。具体如下: Python代码如下: 复制代码 代码如下:#coding=utf-8   ''...

Python 实现遥感影像波段组合的示例代码

Python 实现遥感影像波段组合的示例代码

最近要做个遥感相关的小系统,需要波段组合功能,网上找了可以使用ArcGIS安装时自带的arcpy包,但是Python3.7不能使用现有ArcGIS10.2版本,也不想再装其他版本,所以只...

pytorch逐元素比较tensor大小实例

如下所示: import torch a = torch.tensor([[0.01, 0.011], [0.009, 0.9]]) mask = a.gt(0.01) print(...