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d„ZRS(sáGenerates and return an object, keeping it as a
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    strongly referenced.

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            "some important object."
            def __init__(self, identifier):
                self.identifier = identifier

        registry = NameRegistry(MyFoo)

        # thread 1:
        my_foo = registry.get("foo1")

        # thread 2
        my_foo = registry.get("foo1")

    Above, ``my_foo`` in both thread #1 and #2 will
    be *the same object*.   The constructor for
    ``MyFoo`` will be called once, passing the
    identifier ``foo1`` as the argument.

    When thread 1 and thread 2 both complete or
    otherwise delete references to ``my_foo``, the
    object is *removed* from the :class:`.NameRegistry` as
    a result of Python garbage collection.

    :param creator: A function that will create a new
     value, given the identifier passed to the :meth:`.NameRegistry.get`
     method.

    cCs+tj
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Get and possibly create the value.

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         will also be passed to the creation function.
        :param \*args, \**kw: Additional arguments which will
         also be passed to the creation function if it is
         called.

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