Package Products :: Package ZenUtils :: Module Utils :: Class Singleton |
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# Type Singleton

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    object --+
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          type --+
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                Singleton

Metaclass that ensures only a single instance of a class is ever created.

This is accomplished by storing the first instance created as an attribute of the class itself, then checking that attribute for later constructor calls.

Instance Methods | [hide private]
__init__(cls, *args, **kwargs) x.__init__(...) initializes x; see x.__class__.__doc__ for signature | source code
__call__(cls, *args, **kwargs) x(...) | source code
Inherited from `type`: `__cmp__`, `__delattr__`, `__getattribute__`, `__hash__`, `__new__`, `__repr__`, `__setattr__`, `__subclasses__`, `mro` Inherited from `object`: `__reduce__`, `__reduce_ex__`, `__str__`

Properties | [hide private]
Inherited from `type`: `__base__`, `__bases__`, `__basicsize__`, `__dictoffset__`, `__flags__`, `__itemsize__`, `__mro__`, `__name__`, `__weakrefoffset__` Inherited from `object`: `__class__`

Method Details | [hide private]

### __init__(cls, *args, **kwargs) (Constructor) | source code
x.__init__(...) initializes x; see x.__class__.__doc__ for signature Overrides: object.__init__ (inherited documentation)

### __call__(cls, *args, **kwargs) (Call operator) | source code
x(...) Overrides: type.__call__ (inherited documentation)