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

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object --+    
         |    
      type --+
             |
            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]
the object's type
__init__(cls, *args, **kwargs)
x.__init__(...) initializes x; see help(type(x)) for signature
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__call__(cls, *args, **kwargs)
x(...)
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Inherited from type: __delattr__, __eq__, __ge__, __getattribute__, __gt__, __hash__, __instancecheck__, __le__, __lt__, __ne__, __new__, __repr__, __setattr__, __subclasscheck__, __subclasses__, mro

Properties [hide private]

Inherited from type: __abstractmethods__, __base__, __bases__, __basicsize__, __dictoffset__, __flags__, __itemsize__, __mro__, __name__, __weakrefoffset__

Method Details [hide private]

__init__(cls, *args, **kwargs)
(Constructor)

source code 

x.__init__(...) initializes x; see help(type(x)) for signature

Returns: the object's type
Overrides: type.__init__
(inherited documentation)

__call__(cls, *args, **kwargs)
(Call operator)

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x(...)

Overrides: type.__call__
(inherited documentation)