def pipeline_exists(url, pipeline_id, auth, verify_ssl):
try:<EOL><INDENT>pipeline_status(url, pipeline_id, auth, verify_ssl)['<STR_LIT:status>']<EOL>return True<EOL><DEDENT>except requests.HTTPError:<EOL><INDENT>return False<EOL><DEDENT>
: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)