'[Errno 111] Connection refused' when trying to 'get_markets()'

[nosatn]

When I try to run this little script on a raspberry pi

#!/usr/bin/python3

from dydx3 import Client
from web3 import Web3

#
# Access public API endpoints.
#
public_client = Client(
    host='http://localhost:8080',
)
public_client.public.get_markets()

this error occurs

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 169, in _new_conn
    conn = connection.create_connection(
  File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 96, in create_connection
    raise err
  File "/usr/lib/python3/dist-packages/urllib3/util/connection.py", line 86, in create_connection
    sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 699, in urlopen
    httplib_response = self._make_request(
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 394, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 234, in request
    super(HTTPConnection, self).request(method, url, body=body, headers=headers)
  File "/usr/lib/python3.9/http/client.py", line 1255, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib/python3.9/http/client.py", line 1301, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.9/http/client.py", line 1250, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.9/http/client.py", line 1010, in _send_output
    self.send(msg)
  File "/usr/lib/python3.9/http/client.py", line 950, in send
    self.connect()
  File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 200, in connect
    conn = self._new_conn()
  File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 181, in _new_conn
    raise NewConnectionError(
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPConnection object at 0x747b91a8>: Failed to establish a new connection: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/requests/adapters.py", line 439, in send
    resp = conn.urlopen(
  File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 755, in urlopen
    retries = retries.increment(
  File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 574, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='localhost', port=8080): Max retries exceeded with url: /v3/markets (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x747b91a8>: Failed to establish a new connection: [Errno 111] Connection refused'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/pi/roli/crypto/test4.py", line 12, in <module>
    public_client.public.get_markets()
  File "/home/pi/.local/lib/python3.9/site-packages/dydx3/modules/public.py", line 84, in get_markets
    return self._get(uri, {'market': market})
  File "/home/pi/.local/lib/python3.9/site-packages/dydx3/modules/public.py", line 19, in _get
    return request(
  File "/home/pi/.local/lib/python3.9/site-packages/dydx3/helpers/requests.py", line 24, in request
    response = send_request(
  File "/home/pi/.local/lib/python3.9/site-packages/dydx3/helpers/requests.py", line 43, in send_request
    return getattr(session, method)(uri, headers=headers, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 555, in get
    return self.request('GET', url, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/lib/python3/dist-packages/requests/sessions.py", line 655, in send
    r = adapter.send(request, **kwargs)
  File "/usr/lib/python3/dist-packages/requests/adapters.py", line 516, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8080): Max retries exceeded with url: /v3/markets (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x747b91a8>: Failed to establish a new connection: [Errno 111] Connection refused'))

can anybody help?