Python单例模式实例

#encoding=utf-8
#单例模式
def PrintInfo(info):
#  print unicode(info,'utf-8').decode('gbk')
  print info.decode('utf-8').encode('utf-8')
import threading
#单例类
class Singleton():
  instance=None
  mutex=threading.Lock()
  def _init__(self):
    pass
  @staticmethod
  def GetInstance():
    if(Singleton.instance==None):
      Singleton.mutex.acquire()
      if(Singleton.instance==None):
        PrintInfo('初始化实例')
        Singleton.instance=Singleton()
      else:
        PrintInfo('单例已经实例化')
      Singleton.mutex.release()
    else:
      PrintInfo('单例已经实例化')
    return Singleton.instance
def clientUI():
  Singleton.GetInstance()
  Singleton.GetInstance()
  Singleton.GetInstance()
  return
if __name__=='__main__':
  clientUI();

初始化实例 单例已经实例化 单例已经实例化

class MyClass:
 ...
 @classmethod # classmethod的修饰符
 def class_method(cls, arg1, arg2, ...):
  ...
 @staticmethod # staticmethod的修饰符
 def static_method(arg1, arg2, ...):
  ...

class MyClass:
 i = 123 # class-level variable
 def __init__(self):
 self.i = 456 # object-level variable
 ...