when index_exists = es.indices.exists(elasticsearch_index),elasticsearch.exceptions.ConnectionError

[C-YEE00]

when index(error): elasticsearch.exceptions.ConnectionError: ConnectionError(<urllib3.connection.HTTPConnection object at 0x7f0ac0ca7a60>: Failed to establish a new connection: [Errno 111] Connection refused) caused by: NewConnectionError(<urllib3.connection.HTTPConnection object at 0x7f0ac0ca7a60>: Failed to establish a new connection: [Errno 111] Connection refused)

I tried many methods are not feasible, is there any other implementation code?