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- getweakrefcount(...)
- getweakrefcount(object) -- return the number of weak references
to 'object'.
- getweakrefs(...)
- getweakrefs(object) -- return a list of all weak reference objects
that point to 'object'.
- proxy(...)
- proxy(object[, callback]) -- create a proxy object that weakly
references 'object'. 'callback', if given, is called with a
reference to the proxy when 'object' is about to be finalized.
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