[Tutor] Need info regd Singleton class implementation

[Andre Roberge]

On 6/15/06, Akanksha Govil <govilakanksha at yahoo.com> wrote:
> hi,
>
> I need to implement a singleton class in python.
> Please give me some refernce sites which can help me with the same.

The online Python Cookbook is a good reference site.  Here's the
result from a search:
http://aspn.activestate.com/ASPN/search?query=singleton&x=0&y=0&section=PYTHONCKBK&type=Subsection


I use the following from the printed edition of the Python Cookbook:

class Singleton(object):
    """From the 2nd edition of the Python cookbook.
       Ensures that only one instance is created per running script"""
    def __new__(cls, *args, **kwargs):
        if '_inst' not in vars(cls):
            cls._inst = object.__new__(cls, *args, **kwargs)
        return cls._inst

André

>
> Also i want to know to call a destructor for a singleton class.
>
> Thanks
> Akanksha
>
>
>
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