Here is the full traceback:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connectionpool.py", line 354, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/usr/lib/python3.6/http/client.py", line 1254, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib/python3.6/http/client.py", line 1300, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.6/http/client.py", line 1249, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.6/http/client.py", line 1036, in _send_output
    self.send(msg)
  File "/usr/lib/python3.6/http/client.py", line 974, in send
    self.connect()
  File "/usr/local/lib/python3.6/dist-packages/docker/transport/unixconn.py", line 43, in connect
    sock.connect(self.unix_socket)
FileNotFoundError: [Errno 2] No such file or directory

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.6/dist-packages/requests/adapters.py", line 449, in send
    timeout=timeout
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connectionpool.py", line 638, in urlopen
    _stacktrace=sys.exc_info()[2])
  File "/usr/local/lib/python3.6/dist-packages/urllib3/util/retry.py", line 368, in increment
    raise six.reraise(type(error), error, _stacktrace)
  File "/usr/local/lib/python3.6/dist-packages/urllib3/packages/six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connectionpool.py", line 600, in urlopen
    chunked=chunked)
  File "/usr/local/lib/python3.6/dist-packages/urllib3/connectionpool.py", line 354, in _make_request
    conn.request(method, url, **httplib_request_kw)
  File "/usr/lib/python3.6/http/client.py", line 1254, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/usr/lib/python3.6/http/client.py", line 1300, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.6/http/client.py", line 1249, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/usr/lib/python3.6/http/client.py", line 1036, in _send_output
    self.send(msg)
  File "/usr/lib/python3.6/http/client.py", line 974, in send
    self.connect()
  File "/usr/local/lib/python3.6/dist-packages/docker/transport/unixconn.py", line 43, in connect
    sock.connect(self.unix_socket)
urllib3.exceptions.ProtocolError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "main.py", line 78, in <module>
    main()
  File "main.py", line 32, in main
    docker_client.login(username=docker_username, password=docker_password)
  File "/usr/local/lib/python3.6/dist-packages/docker/client.py", line 183, in login
    return self.api.login(*args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/docker/api/daemon.py", line 149, in login
    response = self._post_json(self._url('/auth'), data=req_data)
  File "/usr/local/lib/python3.6/dist-packages/docker/api/client.py", line 289, in _post_json
    return self._post(url, data=json.dumps(data2), **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/docker/utils/decorators.py", line 46, in inner
    return f(self, *args, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/docker/api/client.py", line 226, in _post
    return self.post(url, **self._set_request_timeout(kwargs))
  File "/usr/local/lib/python3.6/dist-packages/requests/sessions.py", line 581, in post
    return self.request('POST', url, data=data, json=json, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/requests/sessions.py", line 533, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/local/lib/python3.6/dist-packages/requests/sessions.py", line 646, in send
    r = adapter.send(request, **kwargs)
  File "/usr/local/lib/python3.6/dist-packages/requests/adapters.py", line 498, in send
    raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', FileNotFoundError(2, 'No such file or directory'))

So I am trying to log into docker hub using this package. The python script running this is running in a docker container. Below is the Dockerfile:

# Base image with docker and python3.6 installed
FROM mattgleich/python-and-docker

# Image metadata
LABEL maintainer="[email protected]"
LABEL description="Automatically build images anywhere that docker runs"

# Installing Git
RUN apt-get update
RUN apt-get -qq -y install git

# Installing requirements
COPY requirements.txt requirements.txt
RUN pip3 install -r requirements.txt 
RUN export GIT_PYTHON_REFRESH=quiet

COPY /src /src
WORKDIR /src
RUN rm -rf repos

# Fixing some stuff with docker
RUN eval "$(docker-machine env default)"

CMD [ "python3", "main.py" ]

The docker hub password is stored in a folder called configs that is then put into the container using a volume. Below is the error that I get when I start the container with docker compose:

version: "3"

services:
    auto-build-images:
        container_name: auto-build-images
        build: .
        network_mode: "host"
        volumes:
            - ~/auto-build-images-config:/src/config

As far as the script goes, below is a link to the GitHub repo for the project: https://github.com/Matt-Gleich/Auto-Build-Images-Anywhere

RUN eval "$(docker-machine env default)" will not persist these environment values at runtime. You'll need a startup script.

I'm going to close this as it's not related to the SDK.