Issues using MariaDB Jupyter Kernel in Ubuntu 20.04 (no virtual machine)

[JoanLamprea]

Hi, comunity!

I've been trying to instal and to execute the MariaDB Kernel's code because it is imperative for the class I am enrolled in. It happens that I do the process that is in this page and at the moment of executing Jupyter-Lab, I get the errors that I attach below. Additionally, I show you the code I use to do the process. I would appreciate any help you could give me.

`(base) joan@joan-IdeaPad-3-15ALC6:~$ cd Descagas bash: cd: Descagas: No existe el archivo o el directorio (base) joan@joan-IdeaPad-3-15ALC6:~$ cd Descargas (base) joan@joan-IdeaPad-3-15ALC6:~/Descargas$ conda activate maria_env (maria_env) joan@joan-IdeaPad-3-15ALC6:~/Descargas$ python3 -m pip install mariadb_kernel Requirement already satisfied: mariadb_kernel in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (0.2.0) Requirement already satisfied: beautifulsoup4 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mariadb_kernel) (4.10.0) Requirement already satisfied: json2html in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mariadb_kernel) (1.3.0) Requirement already satisfied: mycli in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mariadb_kernel) (1.24.3) Requirement already satisfied: matplotlib in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mariadb_kernel) (3.5.1) Requirement already satisfied: pandas in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mariadb_kernel) (1.3.5) Requirement already satisfied: ipykernel in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mariadb_kernel) (5.5.5) Requirement already satisfied: lxml in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mariadb_kernel) (4.8.0) Requirement already satisfied: setuptools-scm in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mariadb_kernel) (6.4.2) Requirement already satisfied: setuptools in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mariadb_kernel) (58.0.4) Requirement already satisfied: soupsieve>1.2 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from beautifulsoup4->mariadb_kernel) (2.3.1) Requirement already satisfied: traitlets>=4.1.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipykernel->mariadb_kernel) (5.1.1) Requirement already satisfied: ipython>=5.0.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipykernel->mariadb_kernel) (7.31.1) Requirement already satisfied: jupyter-client in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipykernel->mariadb_kernel) (7.1.2) Requirement already satisfied: tornado>=4.2 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipykernel->mariadb_kernel) (6.1) Requirement already satisfied: decorator in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipython>=5.0.0->ipykernel->mariadb_kernel) (5.1.1) Requirement already satisfied: backcall in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipython>=5.0.0->ipykernel->mariadb_kernel) (0.2.0) Requirement already satisfied: jedi>=0.16 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipython>=5.0.0->ipykernel->mariadb_kernel) (0.18.1) Requirement already satisfied: matplotlib-inline in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipython>=5.0.0->ipykernel->mariadb_kernel) (0.1.3) Requirement already satisfied: pexpect>4.3 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipython>=5.0.0->ipykernel->mariadb_kernel) (4.8.0) Requirement already satisfied: pickleshare in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipython>=5.0.0->ipykernel->mariadb_kernel) (0.7.5) Requirement already satisfied: pygments in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipython>=5.0.0->ipykernel->mariadb_kernel) (2.11.2) Requirement already satisfied: prompt-toolkit!=3.0.0,!=3.0.1,<3.1.0,>=2.0.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from ipython>=5.0.0->ipykernel->mariadb_kernel) (3.0.27) Requirement already satisfied: parso<0.9.0,>=0.8.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from jedi>=0.16->ipython>=5.0.0->ipykernel->mariadb_kernel) (0.8.3) Requirement already satisfied: ptyprocess>=0.5 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from pexpect>4.3->ipython>=5.0.0->ipykernel->mariadb_kernel) (0.7.0) Requirement already satisfied: wcwidth in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from prompt-toolkit!=3.0.0,!=3.0.1,<3.1.0,>=2.0.0->ipython>=5.0.0->ipykernel->mariadb_kernel) (0.2.5) Requirement already satisfied: nest-asyncio>=1.5 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from jupyter-client->ipykernel->mariadb_kernel) (1.5.4) Requirement already satisfied: entrypoints in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from jupyter-client->ipykernel->mariadb_kernel) (0.4) Requirement already satisfied: python-dateutil>=2.1 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from jupyter-client->ipykernel->mariadb_kernel) (2.8.2) Requirement already satisfied: pyzmq>=13 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from jupyter-client->ipykernel->mariadb_kernel) (19.0.2) Requirement already satisfied: jupyter-core>=4.6.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from jupyter-client->ipykernel->mariadb_kernel) (4.9.2) Requirement already satisfied: six>=1.5 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from python-dateutil>=2.1->jupyter-client->ipykernel->mariadb_kernel) (1.16.0) Requirement already satisfied: cycler>=0.10 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from matplotlib->mariadb_kernel) (0.11.0) Requirement already satisfied: numpy>=1.17 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from matplotlib->mariadb_kernel) (1.21.5) Requirement already satisfied: fonttools>=4.22.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from matplotlib->mariadb_kernel) (4.29.1) Requirement already satisfied: packaging>=20.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from matplotlib->mariadb_kernel) (21.3) Requirement already satisfied: pillow>=6.2.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from matplotlib->mariadb_kernel) (9.0.1) Requirement already satisfied: pyparsing>=2.2.1 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from matplotlib->mariadb_kernel) (3.0.7) Requirement already satisfied: kiwisolver>=1.0.1 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from matplotlib->mariadb_kernel) (1.3.2) Requirement already satisfied: pyaes>=1.6.1 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mycli->mariadb_kernel) (1.6.1) Requirement already satisfied: click>=7.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mycli->mariadb_kernel) (8.0.4) Requirement already satisfied: cryptography>=1.0.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mycli->mariadb_kernel) (35.0.0) Requirement already satisfied: PyMySQL>=0.9.2 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mycli->mariadb_kernel) (1.0.2) Requirement already satisfied: sqlparse<0.5.0,>=0.3.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mycli->mariadb_kernel) (0.4.2) Requirement already satisfied: pyperclip>=1.8.1 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mycli->mariadb_kernel) (1.8.2) Requirement already satisfied: configobj>=5.0.5 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mycli->mariadb_kernel) (5.0.6) Requirement already satisfied: cli-helpers[styles]>=2.2.1 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from mycli->mariadb_kernel) (2.2.1) Requirement already satisfied: tabulate[widechars]>=0.8.2 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from cli-helpers[styles]>=2.2.1->mycli->mariadb_kernel) (0.8.9) Requirement already satisfied: importlib-metadata in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from click>=7.0->mycli->mariadb_kernel) (4.11.1) Requirement already satisfied: cffi>=1.12 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from cryptography>=1.0.0->mycli->mariadb_kernel) (1.15.0) Requirement already satisfied: pycparser in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from cffi>=1.12->cryptography>=1.0.0->mycli->mariadb_kernel) (2.21) Requirement already satisfied: typing-extensions>=3.6.4 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from importlib-metadata->click>=7.0->mycli->mariadb_kernel) (4.1.1) Requirement already satisfied: zipp>=0.5 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from importlib-metadata->click>=7.0->mycli->mariadb_kernel) (3.7.0) Requirement already satisfied: pytz>=2017.3 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from pandas->mariadb_kernel) (2021.3) Requirement already satisfied: tomli>=1.0.0 in ./sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages (from setuptools-scm->mariadb_kernel) (2.0.1) (maria_env) joan@joan-IdeaPad-3-15ALC6:~/Descargas$ (maria_env) joan@joan-IdeaPad-3-15ALC6:~/Descargas$ python3 -m mariadb_kernel.install Installing Jupyter kernel spec

(maria_env) joan@joan-IdeaPad-3-15ALC6:~/Descargas$ (maria_env) joan@joan-IdeaPad-3-15ALC6:~/Descargas$ (maria_env) joan@joan-IdeaPad-3-15ALC6:~/Descargas$ jupyter-lab [I 2022-02-27 11:25:44.186 ServerApp] jupyterlab | extension was successfully linked. [I 2022-02-27 11:25:44.323 ServerApp] nbclassic | extension was successfully linked. [I 2022-02-27 11:25:44.347 ServerApp] nbclassic | extension was successfully loaded. [I 2022-02-27 11:25:44.348 LabApp] JupyterLab extension loaded from /home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/jupyterlab [I 2022-02-27 11:25:44.348 LabApp] JupyterLab application directory is /home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/share/jupyter/lab [I 2022-02-27 11:25:44.351 ServerApp] jupyterlab | extension was successfully loaded. [I 2022-02-27 11:25:44.352 ServerApp] Serving notebooks from local directory: /home/joan/Descargas [I 2022-02-27 11:25:44.352 ServerApp] Jupyter Server 1.13.5 is running at: [I 2022-02-27 11:25:44.352 ServerApp] http://localhost:8888/lab?token=d2aab2884874d44032e8216f02ff81f1963936b2dd9dcd0f [I 2022-02-27 11:25:44.352 ServerApp] or http://127.0.0.1:8888/lab?token=d2aab2884874d44032e8216f02ff81f1963936b2dd9dcd0f [I 2022-02-27 11:25:44.352 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation). [C 2022-02-27 11:25:44.397 ServerApp]

To access the server, open this file in a browser:
    file:///home/joan/.local/share/jupyter/runtime/jpserver-6074-open.html
Or copy and paste one of these URLs:
    http://localhost:8888/lab?token=d2aab2884874d44032e8216f02ff81f1963936b2dd9dcd0f
 or http://127.0.0.1:8888/lab?token=d2aab2884874d44032e8216f02ff81f1963936b2dd9dcd0f

[W 2022-02-27 11:25:48.527 LabApp] Could not determine jupyterlab build status without nodejs [W 2022-02-27 11:25:49.098 ServerApp] Notebook Untitled.ipynb is not trusted [I 2022-02-27 11:25:49.316 ServerApp] Kernel started: 6d5244c6-e2a6-48a0-8bc8-4ac9dab71679 [IPKernelApp] ERROR | MariaDB client failed to start [IPKernelApp] ERROR | Most probably the MariaDB server is not started [IPKernelApp] ERROR | No MariaDB Server found at /usr/bin/mariadbd; [IPKernelApp] ERROR | Please install MariaDB from mariadb.org/download [IPKernelApp] ERROR | If this is on purpose, you are limited to connecting to remote databases only [IPKernelApp] Starting a client connection used in code completion [IPKernelApp] ERROR | MariaDB client failed to start [IPKernelApp] ERROR | Most probably the MariaDB server is not started [IPKernelApp] ERROR | Code completion functionalities were disabled due to an unexpected error [W 2022-02-27 11:25:53.227 ServerApp] Got events for closed stream None [IPKernelApp] ERROR | Exception in message handler: Traceback (most recent call last): File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/ipykernel/kernelbase.py", line 261, in dispatch_shell yield gen.maybe_future(handler(stream, idents, msg)) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/tornado/gen.py", line 762, in run value = future.result() File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/tornado/gen.py", line 234, in wrapper yielded = ctx_run(next, result) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/ipykernel/kernelbase.py", line 538, in execute_request user_expressions, allow_stdin, File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/mariadb_kernel/kernel.py", line 129, in do_execute result = self.mariadb_client.run_statement(s) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/mariadb_kernel/mariadb_client.py", line 108, in run_statement result = self.maria_repl.run_command(code, timeout) AttributeError: 'NoneType' object has no attribute 'run_command' [I 2022-02-27 11:26:29.851 ServerApp] Starting buffering for 6d5244c6-e2a6-48a0-8bc8-4ac9dab71679:f9301cc5-18cf-411d-b285-aeb3e5ed4d09 [I 2022-02-27 11:26:29.868 ServerApp] Starting buffering for 6d5244c6-e2a6-48a0-8bc8-4ac9dab71679:0830b157-7c86-4b79-a278-ce151f1d680f [I 2022-02-27 11:26:29.872 ServerApp] Discarding 3 buffered messages for 6d5244c6-e2a6-48a0-8bc8-4ac9dab71679:0830b157-7c86-4b79-a278-ce151f1d680f [E 2022-02-27 11:26:29.879 ServerApp] Uncaught exception in ZMQStream callback Traceback (most recent call last): File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 444, in _run_callback callback(*args, *kwargs) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 203, in self.on_recv(lambda msg: callback(self, msg), copy=copy) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/jupyter_server/services/kernels/handlers.py", line 534, in _on_zmq_reply super(ZMQChannelsHandler, self)._on_zmq_reply(stream, msg) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/jupyter_server/base/zmqhandlers.py", line 301, in _on_zmq_reply self.write_message(msg, binary=isinstance(msg, bytes)) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/tornado/websocket.py", line 337, in write_message raise WebSocketClosedError() tornado.websocket.WebSocketClosedError [E 2022-02-27 11:26:29.883 ServerApp] Uncaught exception in zmqstream callback Traceback (most recent call last): File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 462, in _handle_events self._handle_recv() File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 492, in _handle_recv self._run_callback(callback, msg) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 444, in _run_callback callback(args, kwargs) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 203, in self.on_recv(lambda msg: callback(self, msg), copy=copy) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/jupyter_server/services/kernels/handlers.py", line 534, in _on_zmq_reply super(ZMQChannelsHandler, self)._on_zmq_reply(stream, msg) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/jupyter_server/base/zmqhandlers.py", line 301, in _on_zmq_reply self.write_message(msg, binary=isinstance(msg, bytes)) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/tornado/websocket.py", line 337, in write_message raise WebSocketClosedError() tornado.websocket.WebSocketClosedError Exception in callback BaseAsyncIOLoop._handle_events(23, 1) handle: <Handle BaseAsyncIOLoop._handle_events(23, 1)> Traceback (most recent call last): File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/asyncio/events.py", line 88, in _run self._context.run(self._callback, self._args) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/tornado/platform/asyncio.py", line 189, in _handle_events handler_func(fileobj, events) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 462, in _handle_events self._handle_recv() File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 492, in _handle_recv self._run_callback(callback, msg) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 444, in _run_callback callback(args, kwargs) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/zmq/eventloop/zmqstream.py", line 203, in self.on_recv(lambda msg: callback(self, msg), copy=copy) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/jupyter_server/services/kernels/handlers.py", line 534, in _on_zmq_reply super(ZMQChannelsHandler, self)._on_zmq_reply(stream, msg) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/jupyter_server/base/zmqhandlers.py", line 301, in _on_zmq_reply self.write_message(msg, binary=isinstance(msg, bytes)) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/tornado/websocket.py", line 337, in write_message raise WebSocketClosedError() tornado.websocket.WebSocketClosedError [I 2022-02-27 11:26:29.885 ServerApp] Starting buffering for 6d5244c6-e2a6-48a0-8bc8-4ac9dab71679:f9301cc5-18cf-411d-b285-aeb3e5ed4d09 [W 2022-02-27 11:26:31.273 LabApp] Could not determine jupyterlab build status without nodejs [W 2022-02-27 11:26:31.828 ServerApp] Notebook Untitled.ipynb is not trusted [IPKernelApp] ERROR | Exception in message handler: Traceback (most recent call last): File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/ipykernel/kernelbase.py", line 261, in dispatch_shell yield gen.maybe_future(handler(stream, idents, msg)) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/tornado/gen.py", line 762, in run value = future.result() File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/tornado/gen.py", line 234, in wrapper yielded = ctx_run(next, result) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/ipykernel/kernelbase.py", line 538, in execute_request user_expressions, allow_stdin, File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/mariadb_kernel/kernel.py", line 129, in do_execute result = self.mariadb_client.run_statement(s) File "/home/joan/Descargas/sudo/home/pi/miniconda3/envs/maria_env/lib/python3.7/site-packages/mariadb_kernel/mariadb_client.py", line 108, in run_statement result = self.maria_repl.run_command(code, timeout) AttributeError: 'NoneType' object has no attribute 'run_command' `

[sunxiaoguang]

Looks like client couldn't connect to a MariaDB server. I had similar issue earlier, and figured out there could be multiple reasons for that and here is a list of some of them.

• didn't install mariadb-client and mariadb-server packages
• have a ~/.jupyter/mariadb_config.json file but the configuration is incorrect somehow
• connecting to Oracle distribution of MySQL server instead of MariaDB server.

Of cause there could be more reasons, but hope these hints help.

[sunxiaoguang]

BTW: I have created a PR to make it possible to connect to other MySQL compatible servers. Add an extra config item to ~/.jupyter/mariadb_config.json like this will make it work { "server_name": "MySQL" }

[LinuxJedi]

Hi @JoanLamprea,

Are you still having issues regarding this, or did the suggestions provided here help?

[LinuxJedi]

I'm going to close this one for now. But if you have any more issues regarding this please feel free to reopen.