Connection remotely closed on cenpy package import (10054)

[freyn-cna]

I'm not 100% sure how environment-specific this might be, but I am getting my connections remotely closed on package import (10054). This first started happening on code that had previously worked in Jupyter on Windows last week, but I've also tried it in the terminal, and tried creating a new conda environment with fresh installs of everything and it keeps happening in both Jupyter and terminal. Is this happening to anyone else? I should note that I have a version of this script in a Databricks environment where I don't seem to be having this problem, but 1) I have to pip-install on Databricks using subprocess and I don't want to do that on my local machine; 2) the script is too resource-intensive to develop entirely on Databricks.

If others can confirm they do not have this issue, let me know and I will close it.

Terminal output follows below:

---------------------------------------------------------------------------
ConnectionResetError                      Traceback (most recent call last)
File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\connectionpool.py:703, in HTTPConnectionPool.urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
    702 # Make the request on the httplib connection object.
--> 703 httplib_response = self._make_request(
    704     conn,
    705     method,
    706     url,
    707     timeout=timeout_obj,
    708     body=body,
    709     headers=headers,
    710     chunked=chunked,
    711 )
    713 # If we're going to release the connection in ``finally:``, then
    714 # the response doesn't need to know about the connection. Otherwise
    715 # it will also try to release it and we'll have a double-release
    716 # mess.

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\connectionpool.py:386, in HTTPConnectionPool._make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
    385 try:
--> 386     self._validate_conn(conn)
    387 except (SocketTimeout, BaseSSLError) as e:
    388     # Py2 raises this as a BaseSSLError, Py3 raises it as socket timeout.

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\connectionpool.py:1042, in HTTPSConnectionPool._validate_conn(self, conn)
   1041 if not getattr(conn, "sock", None):  # AppEngine might not have  `.sock`
-> 1042     conn.connect()
   1044 if not conn.is_verified:

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\connection.py:414, in HTTPSConnection.connect(self)
    412     context.load_default_certs()
--> 414 self.sock = ssl_wrap_socket(
    415     sock=conn,
    416     keyfile=self.key_file,
    417     certfile=self.cert_file,
    418     key_password=self.key_password,
    419     ca_certs=self.ca_certs,
    420     ca_cert_dir=self.ca_cert_dir,
    421     ca_cert_data=self.ca_cert_data,
    422     server_hostname=server_hostname,
    423     ssl_context=context,
    424     tls_in_tls=tls_in_tls,
    425 )
    427 # If we're using all defaults and the connection
    428 # is TLSv1 or TLSv1.1 we throw a DeprecationWarning
    429 # for the host.

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\util\ssl_.py:449, in ssl_wrap_socket(sock, keyfile, certfile, cert_reqs, ca_certs, server_hostname, ssl_version, ciphers, ssl_context, ca_cert_dir, key_password, ca_cert_data, tls_in_tls)
    448 if send_sni:
--> 449     ssl_sock = _ssl_wrap_socket_impl(
    450         sock, context, tls_in_tls, server_hostname=server_hostname
    451     )
    452 else:

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\util\ssl_.py:493, in _ssl_wrap_socket_impl(sock, ssl_context, tls_in_tls, server_hostname)
    492 if server_hostname:
--> 493     return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
    494 else:

File ~\.conda\envs\equity_test2\lib\ssl.py:513, in SSLContext.wrap_socket(self, sock, server_side, do_handshake_on_connect, suppress_ragged_eofs, server_hostname, session)
    507 def wrap_socket(self, sock, server_side=False,
    508                 do_handshake_on_connect=True,
    509                 suppress_ragged_eofs=True,
    510                 server_hostname=None, session=None):
    511     # SSLSocket class handles server_hostname encoding before it calls
    512     # ctx._wrap_socket()
--> 513     return self.sslsocket_class._create(
    514         sock=sock,
    515         server_side=server_side,
    516         do_handshake_on_connect=do_handshake_on_connect,
    517         suppress_ragged_eofs=suppress_ragged_eofs,
    518         server_hostname=server_hostname,
    519         context=self,
    520         session=session
    521     )

File ~\.conda\envs\equity_test2\lib\ssl.py:1071, in SSLSocket._create(cls, sock, server_side, do_handshake_on_connect, suppress_ragged_eofs, server_hostname, context, session)
   1070             raise ValueError("do_handshake_on_connect should not be specified for non-blocking sockets")
-> 1071         self.do_handshake()
   1072 except (OSError, ValueError):

File ~\.conda\envs\equity_test2\lib\ssl.py:1342, in SSLSocket.do_handshake(self, block)
   1341         self.settimeout(None)
-> 1342     self._sslobj.do_handshake()
   1343 finally:

ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host

During handling of the above exception, another exception occurred:

ProtocolError                             Traceback (most recent call last)
File ~\.conda\envs\equity_test2\lib\site-packages\requests\adapters.py:489, in HTTPAdapter.send(self, request, stream, timeout, verify, cert, proxies)
    488 if not chunked:
--> 489     resp = conn.urlopen(
    490         method=request.method,
    491         url=url,
    492         body=request.body,
    493         headers=request.headers,
    494         redirect=False,
    495         assert_same_host=False,
    496         preload_content=False,
    497         decode_content=False,
    498         retries=self.max_retries,
    499         timeout=timeout,
    500     )
    502 # Send the request.
    503 else:

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\connectionpool.py:787, in HTTPConnectionPool.urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
    785     e = ProtocolError("Connection aborted.", e)
--> 787 retries = retries.increment(
    788     method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
    789 )
    790 retries.sleep()

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\util\retry.py:550, in Retry.increment(self, method, url, response, error, _pool, _stacktrace)
    549 if read is False or not self._is_method_retryable(method):
--> 550     raise six.reraise(type(error), error, _stacktrace)
    551 elif read is not None:

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\packages\six.py:769, in reraise(tp, value, tb)
    768 if value.__traceback__ is not tb:
--> 769     raise value.with_traceback(tb)
    770 raise value

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\connectionpool.py:703, in HTTPConnectionPool.urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, **response_kw)
    702 # Make the request on the httplib connection object.
--> 703 httplib_response = self._make_request(
    704     conn,
    705     method,
    706     url,
    707     timeout=timeout_obj,
    708     body=body,
    709     headers=headers,
    710     chunked=chunked,
    711 )
    713 # If we're going to release the connection in ``finally:``, then
    714 # the response doesn't need to know about the connection. Otherwise
    715 # it will also try to release it and we'll have a double-release
    716 # mess.

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\connectionpool.py:386, in HTTPConnectionPool._make_request(self, conn, method, url, timeout, chunked, **httplib_request_kw)
    385 try:
--> 386     self._validate_conn(conn)
    387 except (SocketTimeout, BaseSSLError) as e:
    388     # Py2 raises this as a BaseSSLError, Py3 raises it as socket timeout.

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\connectionpool.py:1042, in HTTPSConnectionPool._validate_conn(self, conn)
   1041 if not getattr(conn, "sock", None):  # AppEngine might not have  `.sock`
-> 1042     conn.connect()
   1044 if not conn.is_verified:

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\connection.py:414, in HTTPSConnection.connect(self)
    412     context.load_default_certs()
--> 414 self.sock = ssl_wrap_socket(
    415     sock=conn,
    416     keyfile=self.key_file,
    417     certfile=self.cert_file,
    418     key_password=self.key_password,
    419     ca_certs=self.ca_certs,
    420     ca_cert_dir=self.ca_cert_dir,
    421     ca_cert_data=self.ca_cert_data,
    422     server_hostname=server_hostname,
    423     ssl_context=context,
    424     tls_in_tls=tls_in_tls,
    425 )
    427 # If we're using all defaults and the connection
    428 # is TLSv1 or TLSv1.1 we throw a DeprecationWarning
    429 # for the host.

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\util\ssl_.py:449, in ssl_wrap_socket(sock, keyfile, certfile, cert_reqs, ca_certs, server_hostname, ssl_version, ciphers, ssl_context, ca_cert_dir, key_password, ca_cert_data, tls_in_tls)
    448 if send_sni:
--> 449     ssl_sock = _ssl_wrap_socket_impl(
    450         sock, context, tls_in_tls, server_hostname=server_hostname
    451     )
    452 else:

File ~\.conda\envs\equity_test2\lib\site-packages\urllib3\util\ssl_.py:493, in _ssl_wrap_socket_impl(sock, ssl_context, tls_in_tls, server_hostname)
    492 if server_hostname:
--> 493     return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
    494 else:

File ~\.conda\envs\equity_test2\lib\ssl.py:513, in SSLContext.wrap_socket(self, sock, server_side, do_handshake_on_connect, suppress_ragged_eofs, server_hostname, session)
    507 def wrap_socket(self, sock, server_side=False,
    508                 do_handshake_on_connect=True,
    509                 suppress_ragged_eofs=True,
    510                 server_hostname=None, session=None):
    511     # SSLSocket class handles server_hostname encoding before it calls
    512     # ctx._wrap_socket()
--> 513     return self.sslsocket_class._create(
    514         sock=sock,
    515         server_side=server_side,
    516         do_handshake_on_connect=do_handshake_on_connect,
    517         suppress_ragged_eofs=suppress_ragged_eofs,
    518         server_hostname=server_hostname,
    519         context=self,
    520         session=session
    521     )

File ~\.conda\envs\equity_test2\lib\ssl.py:1071, in SSLSocket._create(cls, sock, server_side, do_handshake_on_connect, suppress_ragged_eofs, server_hostname, context, session)
   1070             raise ValueError("do_handshake_on_connect should not be specified for non-blocking sockets")
-> 1071         self.do_handshake()
   1072 except (OSError, ValueError):

File ~\.conda\envs\equity_test2\lib\ssl.py:1342, in SSLSocket.do_handshake(self, block)
   1341         self.settimeout(None)
-> 1342     self._sslobj.do_handshake()
   1343 finally:

ProtocolError: ('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))

During handling of the above exception, another exception occurred:

ConnectionError                           Traceback (most recent call last)
Cell In [1], line 12
     10 import importlib
     11 import urllib
---> 12 import cenpy 
     14 from us import states
     16 import zipfile

File ~\.conda\envs\equity_test2\lib\site-packages\cenpy\__init__.py:4
      1 __version__ = "1.0.1"
      2 __author__ = "Levi John Wolf levi.john.wolf@gmail.com"
----> 4 from . import explorer
      5 from .remote import APIConnection as _APIConnection
      6 from .tools import _load_sitekey, set_sitekey

File ~\.conda\envs\equity_test2\lib\site-packages\cenpy\explorer.py:13
      9     unicode = str
     11 fp = os.path.dirname(os.path.realpath(__file__))
---> 13 resp = raw_APIs = r.get("https://api.census.gov/data.json")
     14 try:
     15     resp.raise_for_status()

File ~\.conda\envs\equity_test2\lib\site-packages\requests\api.py:73, in get(url, params, **kwargs)
     62 def get(url, params=None, **kwargs):
     63     r"""Sends a GET request.
     64 
     65     :param url: URL for the new :class:`Request` object.
   (...)
     70     :rtype: requests.Response
     71     """
---> 73     return request("get", url, params=params, **kwargs)

File ~\.conda\envs\equity_test2\lib\site-packages\requests\api.py:59, in request(method, url, **kwargs)
     55 # By using the 'with' statement we are sure the session is closed, thus we
     56 # avoid leaving sockets open which can trigger a ResourceWarning in some
     57 # cases, and look like a memory leak in others.
     58 with sessions.Session() as session:
---> 59     return session.request(method=method, url=url, **kwargs)

File ~\.conda\envs\equity_test2\lib\site-packages\requests\sessions.py:587, in Session.request(self, method, url, params, data, headers, cookies, files, auth, timeout, allow_redirects, proxies, hooks, stream, verify, cert, json)
    582 send_kwargs = {
    583     "timeout": timeout,
    584     "allow_redirects": allow_redirects,
    585 }
    586 send_kwargs.update(settings)
--> 587 resp = self.send(prep, **send_kwargs)
    589 return resp

File ~\.conda\envs\equity_test2\lib\site-packages\requests\sessions.py:701, in Session.send(self, request, **kwargs)
    698 start = preferred_clock()
    700 # Send the request
--> 701 r = adapter.send(request, **kwargs)
    703 # Total elapsed time of the request (approximately)
    704 elapsed = preferred_clock() - start

File ~\.conda\envs\equity_test2\lib\site-packages\requests\adapters.py:547, in HTTPAdapter.send(self, request, stream, timeout, verify, cert, proxies)
    544             raise
    546 except (ProtocolError, OSError) as err:
--> 547     raise ConnectionError(err, request=request)
    549 except MaxRetryError as e:
    550     if isinstance(e.reason, ConnectTimeoutError):
    551         # TODO: Remove this in 3.0.0: see #2811

ConnectionError: ('Connection aborted.', ConnectionResetError(10054, 'An existing connection was forcibly closed by the remote host', None, 10054, None))

[albenbagabaldo]

Are you still having this problem? I'm also experiencing it.

[jGaboardi]

Also having a similar one that raises ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response')):

Python 3.11.6 | packaged by conda-forge | (main, Oct  3 2023, 10:40:37) [Clang 15.0.7 ]
Type 'copyright', 'credits' or 'license' for more information
IPython 8.16.1 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import cenpy
---------------------------------------------------------------------------
RemoteDisconnected                        Traceback (most recent call last)
File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/urllib3/connectionpool.py:790, in HTTPConnectionPool.urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, preload_content, decode_content, **response_kw)
    789 # Make the request on the HTTPConnection object
--> 790 response = self._make_request(
    791     conn,
    792     method,
    793     url,
    794     timeout=timeout_obj,
    795     body=body,
    796     headers=headers,
    797     chunked=chunked,
    798     retries=retries,
    799     response_conn=response_conn,
    800     preload_content=preload_content,
    801     decode_content=decode_content,
    802     **response_kw,
    803 )
    805 # Everything went great!

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/urllib3/connectionpool.py:536, in HTTPConnectionPool._make_request(self, conn, method, url, body, headers, retries, timeout, chunked, response_conn, preload_content, decode_content, enforce_content_length)
    535 try:
--> 536     response = conn.getresponse()
    537 except (BaseSSLError, OSError) as e:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/urllib3/connection.py:461, in HTTPConnection.getresponse(self)
    460 # Get the response from http.client.HTTPConnection
--> 461 httplib_response = super().getresponse()
    463 try:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/http/client.py:1378, in HTTPConnection.getresponse(self)
   1377 try:
-> 1378     response.begin()
   1379 except ConnectionError:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/http/client.py:318, in HTTPResponse.begin(self)
    317 while True:
--> 318     version, status, reason = self._read_status()
    319     if status != CONTINUE:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/http/client.py:287, in HTTPResponse._read_status(self)
    284 if not line:
    285     # Presumably, the server closed the connection before
    286     # sending a valid response.
--> 287     raise RemoteDisconnected("Remote end closed connection without"
    288                              " response")
    289 try:

RemoteDisconnected: Remote end closed connection without response

During handling of the above exception, another exception occurred:

ProtocolError                             Traceback (most recent call last)
File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/requests/adapters.py:486, in HTTPAdapter.send(self, request, stream, timeout, verify, cert, proxies)
    485 try:
--> 486     resp = conn.urlopen(
    487         method=request.method,
    488         url=url,
    489         body=request.body,
    490         headers=request.headers,
    491         redirect=False,
    492         assert_same_host=False,
    493         preload_content=False,
    494         decode_content=False,
    495         retries=self.max_retries,
    496         timeout=timeout,
    497         chunked=chunked,
    498     )
    500 except (ProtocolError, OSError) as err:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/urllib3/connectionpool.py:844, in HTTPConnectionPool.urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, preload_content, decode_content, **response_kw)
    842     new_e = ProtocolError("Connection aborted.", new_e)
--> 844 retries = retries.increment(
    845     method, url, error=new_e, _pool=self, _stacktrace=sys.exc_info()[2]
    846 )
    847 retries.sleep()

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/urllib3/util/retry.py:470, in Retry.increment(self, method, url, response, error, _pool, _stacktrace)
    469 if read is False or method is None or not self._is_method_retryable(method):
--> 470     raise reraise(type(error), error, _stacktrace)
    471 elif read is not None:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/urllib3/util/util.py:38, in reraise(tp, value, tb)
     37 if value.__traceback__ is not tb:
---> 38     raise value.with_traceback(tb)
     39 raise value

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/urllib3/connectionpool.py:790, in HTTPConnectionPool.urlopen(self, method, url, body, headers, retries, redirect, assert_same_host, timeout, pool_timeout, release_conn, chunked, body_pos, preload_content, decode_content, **response_kw)
    789 # Make the request on the HTTPConnection object
--> 790 response = self._make_request(
    791     conn,
    792     method,
    793     url,
    794     timeout=timeout_obj,
    795     body=body,
    796     headers=headers,
    797     chunked=chunked,
    798     retries=retries,
    799     response_conn=response_conn,
    800     preload_content=preload_content,
    801     decode_content=decode_content,
    802     **response_kw,
    803 )
    805 # Everything went great!

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/urllib3/connectionpool.py:536, in HTTPConnectionPool._make_request(self, conn, method, url, body, headers, retries, timeout, chunked, response_conn, preload_content, decode_content, enforce_content_length)
    535 try:
--> 536     response = conn.getresponse()
    537 except (BaseSSLError, OSError) as e:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/urllib3/connection.py:461, in HTTPConnection.getresponse(self)
    460 # Get the response from http.client.HTTPConnection
--> 461 httplib_response = super().getresponse()
    463 try:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/http/client.py:1378, in HTTPConnection.getresponse(self)
   1377 try:
-> 1378     response.begin()
   1379 except ConnectionError:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/http/client.py:318, in HTTPResponse.begin(self)
    317 while True:
--> 318     version, status, reason = self._read_status()
    319     if status != CONTINUE:

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/http/client.py:287, in HTTPResponse._read_status(self)
    284 if not line:
    285     # Presumably, the server closed the connection before
    286     # sending a valid response.
--> 287     raise RemoteDisconnected("Remote end closed connection without"
    288                              " response")
    289 try:

ProtocolError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

During handling of the above exception, another exception occurred:

ConnectionError                           Traceback (most recent call last)
Cell In[1], line 1
----> 1 import cenpy

File ~/cenpy/cenpy/__init__.py:4
      1 __version__ = "1.0.1"
      2 __author__ = "Levi John Wolf levi.john.wolf@gmail.com"
----> 4 from . import explorer
      5 from .remote import APIConnection as _APIConnection
      6 from .tools import _load_sitekey, set_sitekey

File ~/cenpy/cenpy/explorer.py:13
      9     unicode = str
     11 fp = os.path.dirname(os.path.realpath(__file__))
---> 13 resp = raw_APIs = r.get("https://api.census.gov/data.json")
     14 try:
     15     resp.raise_for_status()

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/requests/api.py:73, in get(url, params, **kwargs)
     62 def get(url, params=None, **kwargs):
     63     r"""Sends a GET request.
     64 
     65     :param url: URL for the new :class:`Request` object.
   (...)
     70     :rtype: requests.Response
     71     """
---> 73     return request("get", url, params=params, **kwargs)

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/requests/api.py:59, in request(method, url, **kwargs)
     55 # By using the 'with' statement we are sure the session is closed, thus we
     56 # avoid leaving sockets open which can trigger a ResourceWarning in some
     57 # cases, and look like a memory leak in others.
     58 with sessions.Session() as session:
---> 59     return session.request(method=method, url=url, **kwargs)

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/requests/sessions.py:589, in Session.request(self, method, url, params, data, headers, cookies, files, auth, timeout, allow_redirects, proxies, hooks, stream, verify, cert, json)
    584 send_kwargs = {
    585     "timeout": timeout,
    586     "allow_redirects": allow_redirects,
    587 }
    588 send_kwargs.update(settings)
--> 589 resp = self.send(prep, **send_kwargs)
    591 return resp

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/requests/sessions.py:703, in Session.send(self, request, **kwargs)
    700 start = preferred_clock()
    702 # Send the request
--> 703 r = adapter.send(request, **kwargs)
    705 # Total elapsed time of the request (approximately)
    706 elapsed = preferred_clock() - start

File ~/mambaforge/envs/py311_cenpy/lib/python3.11/site-packages/requests/adapters.py:501, in HTTPAdapter.send(self, request, stream, timeout, verify, cert, proxies)
    486     resp = conn.urlopen(
    487         method=request.method,
    488         url=url,
   (...)
    497         chunked=chunked,
    498     )
    500 except (ProtocolError, OSError) as err:
--> 501     raise ConnectionError(err, request=request)
    503 except MaxRetryError as e:
    504     if isinstance(e.reason, ConnectTimeoutError):
    505         # TODO: Remove this in 3.0.0: see #2811

ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

[ljwolf]

Hmm. So, these are failures to download the data.json that structures the automatically-generated portion of the API. That download has grown since the package was written from something below 1MB to about 4MB today.

We could make this asynchronous and cached, which would avoid this at import, but eventually that needs to get downloaded to generate the metadata about the census data products.

I will try to work through this in the coming weeks.

[jGaboardi]

Also, FWIW:

• I get that ConnectionError on my personal and work macOS (work goes through VPN)
• I can import cenpy without problem on multiple work VMs (Linux)