apppublic/appPublic/Singleton.py

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Python
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2019-07-16 16:33:07 +08:00
#
from appPublic.dictObject import DictObject
class SingletonDecorator:
def __init__(self,klass):
self.klass = klass
self.instance = None
def __call__(self,*args,**kwds):
if self.instance == None:
self.instance = self.klass(*args,**kwds)
return self.instance
@SingletonDecorator
class GlobalEnv(DictObject):
pass
if __name__ == '__main__':
@SingletonDecorator
class Child(object):
def __init__(self,name):
print("clild.init")
self.name = name
def __str__(self):
return 'HAHA' + self.name
def __expr__(self):
print(self.name)
@SingletonDecorator
class Handle(object):
def __init__(self,name):
self.name = name
def __expr__(self):
print(self.name)
c = Child('me')
d = Child('he')
print(str(c),str(d))
e = Handle('hammer')
f = Handle('nail');
print(str(e),str(f))