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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_app_iter(self, environ):
 """Returns the application iterator for the given environ. Depending on the request method and the current status code the return value might be an empty response rather than the one from the response. If the request method is `HEAD` or the status code is in a range where the HTTP specification requires an empty response, an empty iterable is returned. .. versionadded:: 0.6 :param environ: the WSGI environment of the request. :return: a response iterable. """

        status = self.status_code
        if environ['REQUEST_METHOD'] == 'HEAD' or \
           100 <= status < 200 or status in (204, 304):
            iterable = ()
        elif self.direct_passthrough:
            if __debug__:
                _warn_if_string(self.response)
            return self.response
        else:
            iterable = self.iter_encoded()
        return ClosingIterator(iterable, self.close)