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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 get_namespace(self):
 """ Find the name the user is using to access holoviews. """

        if 'holoviews' not in sys.modules:
            raise ImportError('HoloViews does not seem to be imported')
        matches = [k for k,v in get_ipython().user_ns.items() # noqa (get_ipython)
           if not k.startswith('_') and v is sys.modules['holoviews']]
        if len(matches) == 0:
            raise Exception("Could not find holoviews module in namespace")
        return '%s.archive' % matches[0]