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# singletonify

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## install

``` cmd
pip install singletonify

## usage

``` py
class YourClass:
def __init__(self, a): ...

assert YourClass() is YourClass()

## why not other

There are many singleton libraries on pypi, but their all has problem:

* [singleton]( - cannot use `issubclass()` or `__mro__` or ...
* [singleton-decorator]( - cannot use `isinstance()` .
* [singleton_factory]( - wtf, why do people use `dict()[hash(obj)] = obj` ?
* [singletonmetaclasss]( - a little like this, but not a decorator.
* [singleton3]( - haha
* [pysingleton]( - ABANDONED.

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