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

Type Singleton

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

source code

__call__(cls, *args, **kwargs)
x(...)

source code

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)

source code

x(...)

Overrides: type.__call__: (inherited documentation)

Type Singleton

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

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

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

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