A helper class to deal with mmlib resource de-allocation. The idea is 
  that instances of this class can be held to prevent the Job resources 
  from being cleaned up. When the object is garbage collected, the 
  resources will be freed.
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          | __init__(self,
        handle,
        initializer) x.__init__(...) initializes x; see help(type(x)) for signature
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          | cleanup(self) Clean up the mmjob handle and mmlibs.
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    |  | 
        
          | __del__(self) Clean up the mmjob handle and mmlibs.
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    |  | 
        
          | __copy__(self) Allow only single instance managing the handle.
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    |  | 
        
          | __deepcopy__(self,
        memo=None) Allow only single instance managing the handle.
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    | Inherited from object:__delattr__,__format__,__getattribute__,__hash__,__new__,__reduce__,__reduce_ex__,__repr__,__setattr__,__sizeof__,__str__,__subclasshook__ |