Get startups based on which companies are raising funding

def get_startups_filtered_by(self, filter_='raising'):
    """ Get startups based on which companies are raising funding
    """
    url = _STARTUP_RAISING.format(c_api=_C_API_BEGINNING,
                                                                         api=_API_VERSION,
                                                                         filter_=filter_,
                                                                         at=self.access_token)
    return _get_request(url)