code: def pipeline_exists(url, pipeline_id, auth, verify_ssl):
      '''
      :param url: (str): the host url in the form 'http://host:port/'.
      :param pipeline_id: (string) the pipeline identifier
      :param auth: (tuple) a tuple of username, password
      :return: (boolean)
      '''
      try:
          pipeline_status(url, pipeline_id, auth, verify_ssl)['status']
          return True
      except requests.HTTPError:
          return Falsf pipeline_exists(url, pipeline_id, auth, verify_ssl):
      '''
      :param url: (str): the host url in the form 'http://host:port/'.
      :param pipeline_id: (string) the pipeline identifier
      :param auth: (tuple) a tuple of username, password
      :return: (boolean)
      '''
      try:
          pipeline_status(url, pipeline_id, auth, verify_ssl)['status']
          return True
      except requests.HTTPError:
          return False
docs: :param url: (str): the host url in the form 'http://host:port/'.
      :param pipeline_id: (string) the pipeline identifier
      :param auth: (tuple) a tuple of username, password
      :return: (boolean)