[python] How to force deletion of a python object?

  1. Add an exit handler that closes all the bars.
  2. __del__() gets called when the number of references to an object hits 0 while the VM is still running. This may be caused by the GC.
  3. If __init__() raises an exception then the object is assumed to be incomplete and __del__() won't be invoked.

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How to force deletion of a python object?