An afterword on my "tidying up python": I still have a couple of errors coming up when starting jupyter from the terminal command line. Searching the web revealed that one reason could be that I'm using a too much recent httpx version. My idea is to downgrade to a previous version.
$ port installed | grep httpx
httpx_select @0.1_0 (active)
py311-httpx @0.28.1_0 (active)
py313-httpx @0.28.1_0 (active)
Hoe do I find out, which the previous version is and how do I fall back to this
version?
$ jupyter notebook
[I 2025-07-14 09:07:42.377 ServerApp] jupyter_lsp | extension was successfully
linked.
[I 2025-07-14 09:07:42.385 ServerApp] jupyter_server_terminals | extension was
successfully linked.
[I 2025-07-14 09:07:42.390 ServerApp] jupyterlab | extension was successfully
linked.
[I 2025-07-14 09:07:42.394 ServerApp] notebook | extension was successfully
linked.
[I 2025-07-14 09:07:42.980 ServerApp] notebook_shim | extension was
successfully linked.
[I 2025-07-14 09:07:43.023 ServerApp] notebook_shim | extension was
successfully loaded.
[I 2025-07-14 09:07:43.026 ServerApp] jupyter_lsp | extension was successfully
loaded.
[I 2025-07-14 09:07:43.027 ServerApp] jupyter_server_terminals | extension was
successfully loaded.
[I 2025-07-14 09:07:43.033 LabApp] JupyterLab extension loaded from
/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab
[I 2025-07-14 09:07:43.033 LabApp] JupyterLab application directory is
/opt/local/Library/Frameworks/Python.framework/Versions/3.11/share/jupyter/lab
[I 2025-07-14 09:07:43.034 LabApp] Extension Manager is 'pypi'.
[W 2025-07-14 09:07:43.035 LabApp] Failed to instantiate the extension manager
pypi. Falling back to read-only manager.
Traceback (most recent call last):
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab/labapp.py",
line 837, in initialize_handlers
ext_manager = manager_factory(app_options, listings_config, self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab/extensions/__init__.py",
line 46, in get_pypi_manager
return PyPIExtensionManager(app_options, ext_options, parent)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab/extensions/pypi.py",
line 130, in __init__
self._httpx_client = httpx.AsyncClient(proxies=proxies)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: AsyncClient.__init__() got an unexpected keyword argument
'proxies'
[I 2025-07-14 09:07:43.040 ServerApp] jupyterlab | extension was successfully
loaded.
[I 2025-07-14 09:07:43.044 ServerApp] notebook | extension was successfully
loaded.
[I 2025-07-14 09:07:43.046 ServerApp] Serving notebooks from local directory:
/Users/kuku/Documents/notebooks
[I 2025-07-14 09:07:43.046 ServerApp] Jupyter Server 2.13.0 is running at:
[I 2025-07-14 09:07:43.046 ServerApp]
http://localhost:8888/tree?token=87ba4808ac1bd06a8245a519b0ced81bd37630eb01c2bcfd
[I 2025-07-14 09:07:43.046 ServerApp]
http://127.0.0.1:8888/tree?token=87ba4808ac1bd06a8245a519b0ced81bd37630eb01c2bcfd
[I 2025-07-14 09:07:43.046 ServerApp] Use Control-C to stop this server and
shut down all kernels (twice to skip confirmation).
[C 2025-07-14 09:07:43.174 ServerApp]
To access the server, open this file in a browser:
file:///Users/kuku/Library/Jupyter/runtime/jpserver-63092-open.html
Or copy and paste one of these URLs:
http://localhost:8888/tree?token=87ba4808ac1bd06a8245a519b0ced81bd37630eb01c2bcfd
http://127.0.0.1:8888/tree?token=87ba4808ac1bd06a8245a519b0ced81bd37630eb01c2bcfd
[I 2025-07-14 09:07:43.813 ServerApp] Skipped non-installed server(s):
bash-language-server, dockerfile-language-server-nodejs,
javascript-typescript-langserver, jedi-language-server, julia-language-server,
pyright, python-language-server, python-lsp-server, r-languageserver,
sql-language-server, texlab, typescript-language-server,
unified-language-server, vscode-css-languageserver-bin,
vscode-html-languageserver-bin, vscode-json-languageserver-bin,
yaml-language-server
[W 2025-07-14 09:07:46.117 ServerApp] 404 GET
/lab/api/settings/@jupyterlab/apputils-extension:kernels-settings?1752476866107
(127.0.0.1): Schema not found:
/opt/local/Library/Frameworks/Python.framework/Versions/3.11/share/jupyter/lab/schemas/@jupyterlab/apputils-extension/kernels-settings.json
[W 2025-07-14 09:07:46.117 LabApp] wrote error: 'Schema not found:
/opt/local/Library/Frameworks/Python.framework/Versions/3.11/share/jupyter/lab/schemas/@jupyterlab/apputils-extension/kernels-settings.json'
Traceback (most recent call last):
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/tornado/web.py",
line 1846, in _execute
result = method(*self.path_args, **self.path_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/tornado/web.py",
line 3375, in wrapper
return method(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab_server/settings_handler.py",
line 57, in get
result, warnings = get_settings(
^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab_server/settings_utils.py",
line 379, in get_settings
schema, version = _get_schema(schemas_dir, schema_name, overrides,
labextensions_path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab_server/settings_utils.py",
line 55, in _get_schema
raise web.HTTPError(404, notfound_error % path)
tornado.web.HTTPError: HTTP 404: Not Found (Schema not found:
/opt/local/Library/Frameworks/Python.framework/Versions/3.11/share/jupyter/lab/schemas/@jupyterlab/apputils-extension/kernels-settings.json)
[W 2025-07-14 09:07:46.121 LabApp] 404 GET
/lab/api/settings/@jupyterlab/apputils-extension:kernels-settings?1752476866107
([email protected]) 9.37ms
referer=http://localhost:8888/tree
[W 2025-07-14 09:07:46.498 ServerApp] 404 GET
/lab/api/settings/@jupyter-notebook/notebook-extension:full-width-notebook?1752476866348
(127.0.0.1): Schema not found:
/opt/local/Library/Frameworks/Python.framework/Versions/3.11/share/jupyter/lab/schemas/@jupyter-notebook/notebook-extension/full-width-notebook.json
[W 2025-07-14 09:07:46.499 LabApp] wrote error: 'Schema not found:
/opt/local/Library/Frameworks/Python.framework/Versions/3.11/share/jupyter/lab/schemas/@jupyter-notebook/notebook-extension/full-width-notebook.json'
Traceback (most recent call last):
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/tornado/web.py",
line 1846, in _execute
result = method(*self.path_args, **self.path_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/tornado/web.py",
line 3375, in wrapper
return method(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab_server/settings_handler.py",
line 57, in get
result, warnings = get_settings(
^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab_server/settings_utils.py",
line 379, in get_settings
schema, version = _get_schema(schemas_dir, schema_name, overrides,
labextensions_path)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/local/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-packages/jupyterlab_server/settings_utils.py",
line 55, in _get_schema
raise web.HTTPError(404, notfound_error % path)
tornado.web.HTTPError: HTTP 404: Not Found (Schema not found:
/opt/local/Library/Frameworks/Python.framework/Versions/3.11/share/jupyter/lab/schemas/@jupyter-notebook/notebook-extension/full-width-notebook.json)
--
Christoph
Christoph Kukulies
[email protected]
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