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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_exception_handler(self, exception_type, error_handler, versions=(None, )):
 """Adds a error handler to the hug api"""

        versions = (versions, ) if not isinstance(versions, (tuple, list)) else versions
        if not hasattr(self, '_exception_handlers'):
            self._exception_handlers = {}

        for version in versions:
            placement = self._exception_handlers.setdefault(version, OrderedDict())
            placement[exception_type] = (error_handler, ) + placement.get(exception_type, tuple())