Revision d2c807e4 lib/objects.py

b/lib/objects.py
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    "rename_script",
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    ]
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  @classmethod
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  def FromInvalidOS(cls, err):
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    """Create an OS from an InvalidOS error.
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    This routine knows how to convert an InvalidOS error to an OS
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    object representing the broken OS with a meaningful error message.
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    """
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    if not isinstance(err, errors.InvalidOS):
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      raise errors.ProgrammerError("Trying to initialize an OS from an"
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                                   " invalid object of type %s" % type(err))
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    return cls(name=err.args[0], path=err.args[1], status=err.args[2])
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  def __nonzero__(self):
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    return self.status == constants.OS_VALID_STATUS
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