Calls to `input()` should flush stdout when executing cells #13039

MaddyGuthridge · 2023-03-09T12:01:33Z

Environment data

VS Code version: 1.76.0
Jupyter Extension version (available under the Extensions sidebar): v2023.2.1000592019
Python Extension version (available under the Extensions sidebar): v2023.4.0
OS (Windows | Mac | Linux distro) and version: Fedora 37
Python and/or Anaconda version: Python 3.11.2
Type of virtual environment used (N/A | venv | virtualenv | conda | ...): venv
Jupyter server running: Local

Expected behaviour

When I run a code block containing input and print functions, stdout is flushed whenever the input function is called, so that I can see the full output before typing my input.

Actual behaviour

The buffer only flushes once every 2 inputs on average, meaning that I often can't see the outputs of cells that I need to interact with.

Steps to reproduce:

Run a cell such as this:

while True:
    text = input("Enter some text")
    if text == '':
        print("Goodbye")
        break
    print(f"You entered {text}")

Observe that the print-out happens inconsistently.

This can be fixed by adding a hack such as the following, but it is extremely inconvenient for me to do this to all of the notebooks I need to work with.

import builtins

def input(*args, **kwargs):
    print(end='', flush=True)
    return builtins.input(*args, **kwargs)

Logs

Output for Jupyter in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Jupyter)

Visual Studio Code (1.76.0, undefined, desktop)
Jupyter Extension Version: 2023.2.1000592019.
Python Extension Version: 2023.4.0.
Workspace folder /home/migue/Source/COMP/1010/course_dev/labs-dev
User belongs to experiment group 'jupyterEnhancedDataViewer'
User belongs to experiment group 'jupyterTestcf'
info 22:26:11.323: LSP Notebooks experiment is enabled
info 22:26:11.563: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m pip list
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m pip list
info 22:26:28.308: Starting Jupyter Session startUsingPythonInterpreter, .jvsc74a57bd0ead52af248bf5110408d1f700d37b39ad1311078b7c85ad4052e3ecc15fa24dd./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python.-m#ipykernel_launcher (Python Path: /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv, EnvType: Venv, EnvName: '.venv', Version: 3.11.2 (main, Feb  8 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]) for '/home/migue/Source/COMP/1010/course_dev/labs-dev/submissions/week_02/z5350586 - Chen Du.ipynb' (disableUI=false)
info 22:26:28.364: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
info 22:26:28.409: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9003 --control=9001 --hb=9000 --Session.signature_scheme="hmac-sha256" --Session.key=b"68be1631-a20b-4f9f-b446-734ba592b5f2" --shell=9002 --transport="tcp" --iopub=9004 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053gMVMOvIdphcu.json
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9003 --control=9001 --hb=9000 --Session.signature_scheme="hmac-sha256" --Session.key=b"68be1631-a20b-4f9f-b446-734ba592b5f2" --shell=9002 --transport="tcp" --iopub=9004 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053gMVMOvIdphcu.json
info 22:26:28.409: Process Execution: cwd: ~/Source/COMP/1010/course_dev/labs-dev/submissions/week_02
cwd: ~/Source/COMP/1010/course_dev/labs-dev/submissions/week_02
info 22:26:28.612: ipykernel version & path 6.21.1, ~/Source/COMP/1010/course_dev/labs-dev/.venv/lib64/python3.11/site-packages/ipykernel/__init__.py for /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python
warn 22:26:29.048: StdErr from Kernel Process 0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.

info 22:26:29.383: Started Kernel .venv (Python 3.11.2) (pid: 321765)
info 22:26:29.431: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python ~/.vscode/extensions/ms-toolsai.jupyter-2023.2.1000592019/pythonFiles/printJupyterDataDir.py
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python ~/.vscode/extensions/ms-toolsai.jupyter-2023.2.1000592019/pythonFiles/printJupyterDataDir.py
info 22:27:19.756: Interrupt kernel execution
info 22:27:19.757: Interrupt requested /home/migue/Source/COMP/1010/course_dev/labs-dev/submissions/week_02/z5350586 - Chen Du.ipynb
info 22:27:19.757: Interrupt kernel execution
info 22:27:19.757: Interrupting kernel: pythonjvsc74a57bd0ead52af248bf5110408d1f700d37b39ad1311078b7c85ad4052e3ecc15fa24dd
info 22:27:19.757: Interrupting kernel via SIGINT
info 22:27:20.006: Cancel all remaining cells true || Error || undefined
info 22:27:20.008: Interrupt requested & sent for /home/migue/Source/COMP/1010/course_dev/labs-dev/submissions/week_02/z5350586 - Chen Du.ipynb in notebookEditor.
info 22:34:17.907: Starting Jupyter Session startUsingPythonInterpreter, .jvsc74a57bd0ead52af248bf5110408d1f700d37b39ad1311078b7c85ad4052e3ecc15fa24dd./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python.-m#ipykernel_launcher (Python Path: /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv, EnvType: Venv, EnvName: '.venv', Version: 3.11.2 (main, Feb  8 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]) for '/home/migue/Source/COMP/1010/course_dev/labs-dev/submissions/week_02/z5183911 - Allison Chen.ipynb' (disableUI=false)
info 22:34:17.944: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m pip list
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m pip list
info 22:34:17.980: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
info 22:34:18.029: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9008 --control=9006 --hb=9005 --Session.signature_scheme="hmac-sha256" --Session.key=b"77d8a6d6-a8eb-4495-a236-cc39864256a3" --shell=9007 --transport="tcp" --iopub=9009 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053Q05n5hr1Mu0Q.json
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9008 --control=9006 --hb=9005 --Session.signature_scheme="hmac-sha256" --Session.key=b"77d8a6d6-a8eb-4495-a236-cc39864256a3" --shell=9007 --transport="tcp" --iopub=9009 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053Q05n5hr1Mu0Q.json
info 22:34:18.029: Process Execution: cwd: ~/Source/COMP/1010/course_dev/labs-dev/submissions/week_02
cwd: ~/Source/COMP/1010/course_dev/labs-dev/submissions/week_02
info 22:34:18.187: ipykernel version & path 6.21.1, ~/Source/COMP/1010/course_dev/labs-dev/.venv/lib64/python3.11/site-packages/ipykernel/__init__.py for /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python
warn 22:34:18.584: StdErr from Kernel Process 0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.

info 22:34:19.010: Started Kernel .venv (Python 3.11.2) (pid: 327329)
info 22:40:29.236: Starting Jupyter Session startUsingPythonInterpreter, .jvsc74a57bd0ead52af248bf5110408d1f700d37b39ad1311078b7c85ad4052e3ecc15fa24dd./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python.-m#ipykernel_launcher (Python Path: /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv, EnvType: Venv, EnvName: '.venv', Version: 3.11.2 (main, Feb  8 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]) for '/home/migue/Source/COMP/1010/course_dev/labs-dev/submissions/week_02/z5367167 - Michael Chiu.ipynb' (disableUI=false)
info 22:40:29.454: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m pip list
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m pip list
info 22:40:29.478: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
info 22:40:29.507: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9013 --control=9011 --hb=9010 --Session.signature_scheme="hmac-sha256" --Session.key=b"d8c21f46-85ec-4040-b8b5-84974f83eb6d" --shell=9012 --transport="tcp" --iopub=9014 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053ORaRFf5PO20w.json
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9013 --control=9011 --hb=9010 --Session.signature_scheme="hmac-sha256" --Session.key=b"d8c21f46-85ec-4040-b8b5-84974f83eb6d" --shell=9012 --transport="tcp" --iopub=9014 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053ORaRFf5PO20w.json
info 22:40:29.507: Process Execution: cwd: ~/Source/COMP/1010/course_dev/labs-dev/submissions/week_02
cwd: ~/Source/COMP/1010/course_dev/labs-dev/submissions/week_02
info 22:40:29.701: ipykernel version & path 6.21.1, ~/Source/COMP/1010/course_dev/labs-dev/.venv/lib64/python3.11/site-packages/ipykernel/__init__.py for /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python
warn 22:40:30.088: StdErr from Kernel Process 0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.

info 22:40:30.384: Started Kernel .venv (Python 3.11.2) (pid: 331736)
info 22:42:23.003: Cancel all remaining cells true || Error || undefined
info 22:43:34.878: Starting Jupyter Session startUsingPythonInterpreter, .jvsc74a57bd0ead52af248bf5110408d1f700d37b39ad1311078b7c85ad4052e3ecc15fa24dd./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python.-m#ipykernel_launcher (Python Path: /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv, EnvType: Venv, EnvName: '.venv', Version: 3.11.2 (main, Feb  8 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]) for '/home/migue/Source/COMP/1010/course_dev/labs-dev/submissions/week_02/z5440815 - Clara Davila.ipynb' (disableUI=false)
info 22:43:34.905: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
info 22:43:34.950: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9018 --control=9016 --hb=9015 --Session.signature_scheme="hmac-sha256" --Session.key=b"bce614b4-7683-40c7-b8fe-d3860d6d400a" --shell=9017 --transport="tcp" --iopub=9019 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053hY07CZO6Hjkg.json
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9018 --control=9016 --hb=9015 --Session.signature_scheme="hmac-sha256" --Session.key=b"bce614b4-7683-40c7-b8fe-d3860d6d400a" --shell=9017 --transport="tcp" --iopub=9019 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053hY07CZO6Hjkg.json
info 22:43:34.950: Process Execution: cwd: ~/Source/COMP/1010/course_dev/labs-dev/submissions/week_02
cwd: ~/Source/COMP/1010/course_dev/labs-dev/submissions/week_02
info 22:43:35.115: ipykernel version & path 6.21.1, ~/Source/COMP/1010/course_dev/labs-dev/.venv/lib64/python3.11/site-packages/ipykernel/__init__.py for /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python
warn 22:43:35.451: StdErr from Kernel Process 0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.

warn 22:43:35.518: StdErr from Kernel Process /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/lib64/python3.11/site-packages/traitlets/traitlets.py:2548: FutureWarning: Supporting extra quotes around strings is deprecated in traitlets 5.0. You can use 'hmac-sha256' instead of '"hmac-sha256"' if you require traitlets >=5.
  warn(

warn 22:43:35.518: StdErr from Kernel Process /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/lib64/python3.11/site-packages/traitlets/traitlets.py:2499: FutureWarning: Supporting extra quotes around Bytes is deprecated in traitlets 5.0. Use 'bce614b4-7683-40c7-b8fe-d3860d6d400a' instead of 'b"bce614b4-7683-40c7-b8fe-d3860d6d400a"'.
  warn(

info 22:43:35.576: Started Kernel .venv (Python 3.11.2) (pid: 333922)
info 22:49:23.643: Starting Jupyter Session startUsingPythonInterpreter, .jvsc74a57bd0ead52af248bf5110408d1f700d37b39ad1311078b7c85ad4052e3ecc15fa24dd./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python./home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/python.-m#ipykernel_launcher (Python Path: /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv, EnvType: Venv, EnvName: '.venv', Version: 3.11.2 (main, Feb  8 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]) for '/home/migue/Source/COMP/1010/course_dev/labs-dev/demo.ipynb' (disableUI=false)
info 22:49:23.681: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
info 22:49:23.727: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m pip list
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m pip list
info 22:49:23.789: Process Execution: > ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9023 --control=9021 --hb=9020 --Session.signature_scheme="hmac-sha256" --Session.key=b"72c04cea-9778-48c4-961f-a9097e5c34a6" --shell=9022 --transport="tcp" --iopub=9024 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053MXxvGS4USgZ3.json
> ~/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9023 --control=9021 --hb=9020 --Session.signature_scheme="hmac-sha256" --Session.key=b"72c04cea-9778-48c4-961f-a9097e5c34a6" --shell=9022 --transport="tcp" --iopub=9024 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-320053MXxvGS4USgZ3.json
info 22:49:23.789: Process Execution: cwd: ~/Source/COMP/1010/course_dev/labs-dev
cwd: ~/Source/COMP/1010/course_dev/labs-dev
info 22:49:23.870: ipykernel version & path 6.21.1, ~/Source/COMP/1010/course_dev/labs-dev/.venv/lib64/python3.11/site-packages/ipykernel/__init__.py for /home/migue/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python
warn 22:49:24.377: StdErr from Kernel Process 0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.

info 22:49:24.613: Started Kernel .venv (Python 3.11.2) (pid: 338014)
info 22:59:12.582: Interrupt kernel execution
info 22:59:12.583: Interrupt requested /home/migue/Source/COMP/1010/course_dev/labs-dev/demo.ipynb
info 22:59:12.583: Interrupt kernel execution
info 22:59:12.583: Interrupting kernel: pythonjvsc74a57bd0ead52af248bf5110408d1f700d37b39ad1311078b7c85ad4052e3ecc15fa24dd
info 22:59:12.583: Interrupting kernel via SIGINT
info 22:59:14.578: Cancel all remaining cells true || Error || undefined
info 22:59:14.579: Interrupt requested & sent for /home/migue/Source/COMP/1010/course_dev/labs-dev/demo.ipynb in notebookEditor.

The text was updated successfully, but these errors were encountered:

DonJayamanne · 2023-03-09T21:02:18Z

@MiguelGuthridge please could you try this in Jupyter Notebook (outside vscode)
and let me know whether you get the same behaviour there too?
If its the same, please let me know the version of Jupyter Notebook you are using as well (you can use python -m jupyter --version or jupyter --version

MaddyGuthridge · 2023-03-10T12:26:15Z

Thanks, I've tried this in notebook, and it worked correctly. It also works correctly in Google Colab. This appears to be an issue with VS Code in particular.

Here's my version information:

Selected Jupyter core packages...
IPython          : 8.9.0
ipykernel        : 6.21.1
ipywidgets       : not installed
jupyter_client   : 8.0.2
jupyter_core     : 5.2.0
jupyter_server   : 2.4.0
jupyterlab       : not installed
nbclient         : 0.7.2
nbconvert        : 7.2.9
nbformat         : 5.7.3
notebook         : 6.5.3
qtconsole        : not installed
traitlets        : 5.9.0

DonJayamanne · 2023-03-30T19:52:47Z

@MiguelGuthridge

I am unable to repro this issue, please could you share a screen recording of this issue
Please could you create a new environment and install the latest IPyhton and IPyKernel packages, possible its been fixed in these later versions.
Also, please could you try running the same code in jupyter notebook against this same environment

<full path>/Source/COMP/1010/course_dev/labs-dev/.venv/bin/python -m jupyter notebook,

Also based on the logs, you seem to be interrupting the cells, is that deliberate.

MaddyGuthridge · 2023-03-31T06:01:51Z

Here's a screen recording:

2023-03-31.16-57-51.mp4

The repo with the code is available here: https://github.com/MiguelGuthridge/testJupyter

It doesn't happen immediately in this case, but the issue is present after a few inputs. This was done in a brand new environment with the latest versions of all dependencies.

Here's my pip freeze output in that environment:

asttokens==2.2.1
backcall==0.2.0
comm==0.1.3
debugpy==1.6.6
decorator==5.1.1
executing==1.2.0
ipykernel==6.22.0
ipython==8.12.0
jedi==0.18.2
jupyter_client==8.1.0
jupyter_core==5.3.0
matplotlib-inline==0.1.6
nest-asyncio==1.5.6
packaging==23.0
parso==0.8.3
pexpect==4.8.0
pickleshare==0.7.5
platformdirs==3.2.0
prompt-toolkit==3.0.38
psutil==5.9.4
ptyprocess==0.7.0
pure-eval==0.2.2
Pygments==2.14.0
python-dateutil==2.8.2
pyzmq==25.0.2
six==1.16.0
stack-data==0.6.2
tornado==6.2
traitlets==5.9.0
wcwidth==0.2.6

MaddyGuthridge · 2023-03-31T06:10:43Z

Also here's the output for Jupyter for that session:

Note that at the top, the dependencies aren't installed - I installed them when prompted by VS Code.

Visual Studio Code (1.76.2, undefined, desktop)
Jupyter Extension Version: 2023.2.1200692131.
Python Extension Version: 2023.4.1.
Workspace folder /home/migue/Source/testJupyter
User belongs to experiment group 'jupyterEnhancedDataViewer'
User belongs to experiment group 'jupyterTestcf'
info 16:56:42.448: LSP Notebooks experiment is enabled
warn 16:56:43.272: Failed to get activated env vars with python /bin/python in 259ms
info 16:56:43.318: Process Execution: > /bin/python -c "import site;print("USER_BASE_VALUE");print(site.USER_SITE);print("USER_BASE_VALUE");"
> /bin/python -c "import site;print("USER_BASE_VALUE");print(site.USER_SITE);print("USER_BASE_VALUE");"
info 16:56:43.433: Process Execution: > /bin/python -m pip list
> /bin/python -m pip list
info 16:56:55.937: Starting Jupyter Session startUsingPythonInterpreter, .jvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9./home/migue/Source/testJupyter/.venv/python./home/migue/Source/testJupyter/.venv/python.-m#ipykernel_launcher (Python Path: /home/migue/Source/testJupyter/.venv, EnvType: Venv, EnvName: '.venv', Version: 3.11.2 (main, Feb  8 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]) for '/home/migue/Source/testJupyter/example.ipynb' (disableUI=false)
info 16:56:56.032: Process Execution: > ~/Source/testJupyter/.venv/bin/python -m pip list
> ~/Source/testJupyter/.venv/bin/python -m pip list
info 16:56:56.054: Process Execution: > ~/Source/testJupyter/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
> ~/Source/testJupyter/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
warn 16:56:56.095: Stderr output when getting ipykernel version & path Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'ipykernel' for /home/migue/Source/testJupyter/.venv/bin/python
info 16:56:56.134: Process Execution: > ~/Source/testJupyter/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9003 --control=9001 --hb=9000 --Session.signature_scheme="hmac-sha256" --Session.key=b"7c3ff502-be29-4e35-a8cc-0fab2c5f3f13" --shell=9002 --transport="tcp" --iopub=9004 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-163533C5cssAo4lkGL.json
> ~/Source/testJupyter/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9003 --control=9001 --hb=9000 --Session.signature_scheme="hmac-sha256" --Session.key=b"7c3ff502-be29-4e35-a8cc-0fab2c5f3f13" --shell=9002 --transport="tcp" --iopub=9004 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-163533C5cssAo4lkGL.json
info 16:56:56.134: Process Execution: cwd: ~/Source/testJupyter
cwd: ~/Source/testJupyter
warn 16:56:56.146: StdErr from Kernel Process /home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher

error 16:56:56.149: Disposing kernel process due to an error Ip [Error]: The kernel died. Error: /home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher... View Jupyter [log](command:jupyter.viewOutput) for further details.
    at ChildProcess.<anonymous> (/home/migue/.vscode/extensions/ms-toolsai.jupyter-2023.2.1200692131/out/extension.node.js:17:90652)
    at ChildProcess.emit (node:events:538:35)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:291:12) {
  category: 'kerneldied',
  kernelConnectionMetadata: ea {
    kind: 'startUsingPythonInterpreter',
    kernelSpec: Yo {
      specFile: '/home/migue/.vscode/extensions/ms-toolsai.jupyter-2023.2.1200692131/temp/jupyter/kernels/pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9/kernel.json',
      interpreterPath: '/home/migue/Source/testJupyter/.venv/bin/python',
      isRegisteredByVSC: 'registeredByNewVersionOfExt',
      name: 'pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9',
      argv: [Array],
      language: 'python',
      executable: 'python',
      display_name: '.venv',
      metadata: [Object],
      env: {},
      interrupt_mode: undefined
    },
    interpreter: {
      id: '/home/migue/Source/testJupyter/.venv/bin/python',
      sysPrefix: '/home/migue/Source/testJupyter/.venv',
      envPath: [f],
      displayPath: [f],
      envName: '.venv',
      uri: [f],
      displayName: '.venv',
      envType: 'Venv',
      version: [Object]
    },
    id: '.jvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9./home/migue/Source/testJupyter/.venv/python./home/migue/Source/testJupyter/.venv/python.-m#ipykernel_launcher'
  },
  exitCode: 1,
  stdErr: '/home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher\n'
}
error 16:56:56.152: /home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher

info 16:56:56.152: Dispose Kernel process 165652.
error 16:56:56.153: Kernel Launcher. launch, Class name = Vp, completed in 200ms, has a falsy return value, Arg 1: {"id":".jvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9./home/migue/Source/testJupyter/.venv/python./home/migue/Source/testJupyter/.venv/python.-m#ipykernel_launcher","kernelSpec":{"specFile":"/home/migue/.vscode/extensions/ms-toolsai.jupyter-2023.2.1200692131/temp/jupyter/kernels/pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9/kernel.json","interpreterPath":"/home/migue/Source/testJupyter/.venv/bin/python","isRegisteredByVSC":"registeredByNewVersionOfExt","name":"pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9","argv":["python","-m","ipykernel_launcher","-f","{connection_file}"],"language":"python","executable":"python","display_name":".venv","metadata":{"interpreter":{"path":"/home/migue/Source/testJupyter/.venv/bin/python"}},"env":{}},"interpreter":{"id":"/home/migue/Source/testJupyter/.venv/bin/python","sysPrefix":"/home/migue/Source/testJupyter/.venv","envPath":"/home/migue/Source/testJupyter/.venv","displayPath":"/home/migue/Source/testJupyter/.venv","envName":".venv","displayName":".venv","envType":"Venv","version":{"major":3,"minor":11,"patch":2,"raw":"3.11.2 (main, Feb  8 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]"},"path":"/home/migue/Source/testJupyter/.venv/bin/python"},"kind":"startUsingPythonInterpreter"}, Arg 2: 60000, Arg 3: "~/Source/testJupyter/example.ipynb", Arg 4: "~/Source/testJupyter", Arg 5: <argument cannot be serialized for logging> Ip [Error]: The kernel died. Error: /home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher... View Jupyter [log](command:jupyter.viewOutput) for further details.
    at ChildProcess.<anonymous> (/home/migue/.vscode/extensions/ms-toolsai.jupyter-2023.2.1200692131/out/extension.node.js:17:90652)
    at ChildProcess.emit (node:events:538:35)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:291:12) {
  category: 'kerneldied',
  kernelConnectionMetadata: ea {
    kind: 'startUsingPythonInterpreter',
    kernelSpec: Yo {
      specFile: '/home/migue/.vscode/extensions/ms-toolsai.jupyter-2023.2.1200692131/temp/jupyter/kernels/pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9/kernel.json',
      interpreterPath: '/home/migue/Source/testJupyter/.venv/bin/python',
      isRegisteredByVSC: 'registeredByNewVersionOfExt',
      name: 'pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9',
      argv: [Array],
      language: 'python',
      executable: 'python',
      display_name: '.venv',
      metadata: [Object],
      env: {},
      interrupt_mode: undefined
    },
    interpreter: {
      id: '/home/migue/Source/testJupyter/.venv/bin/python',
      sysPrefix: '/home/migue/Source/testJupyter/.venv',
      envPath: [f],
      displayPath: [f],
      envName: '.venv',
      uri: [f],
      displayName: '.venv',
      envType: 'Venv',
      version: [Object]
    },
    id: '.jvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9./home/migue/Source/testJupyter/.venv/python./home/migue/Source/testJupyter/.venv/python.-m#ipykernel_launcher'
  },
  exitCode: 1,
  stdErr: '/home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher\n',
  vslsStack: [ CallSite {}, CallSite {}, CallSite {} ]
}
error 16:56:56.154: Failed to connect raw kernel session: Error: The kernel died. Error: /home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher... View Jupyter [log](command:jupyter.viewOutput) for further details.
warn 16:56:56.154: Error occurred while trying to start the kernel, options.disableUI=false Ip [Error]: The kernel died. Error: /home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher... View Jupyter [log](command:jupyter.viewOutput) for further details.
    at ChildProcess.<anonymous> (/home/migue/.vscode/extensions/ms-toolsai.jupyter-2023.2.1200692131/out/extension.node.js:17:90652)
    at ChildProcess.emit (node:events:538:35)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:291:12) {
  category: 'kerneldied',
  kernelConnectionMetadata: ea {
    kind: 'startUsingPythonInterpreter',
    kernelSpec: Yo {
      specFile: '/home/migue/.vscode/extensions/ms-toolsai.jupyter-2023.2.1200692131/temp/jupyter/kernels/pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9/kernel.json',
      interpreterPath: '/home/migue/Source/testJupyter/.venv/bin/python',
      isRegisteredByVSC: 'registeredByNewVersionOfExt',
      name: 'pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9',
      argv: [Array],
      language: 'python',
      executable: 'python',
      display_name: '.venv',
      metadata: [Object],
      env: {},
      interrupt_mode: undefined
    },
    interpreter: {
      id: '/home/migue/Source/testJupyter/.venv/bin/python',
      sysPrefix: '/home/migue/Source/testJupyter/.venv',
      envPath: [f],
      displayPath: [f],
      envName: '.venv',
      uri: [f],
      displayName: '.venv',
      envType: 'Venv',
      version: [Object]
    },
    id: '.jvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9./home/migue/Source/testJupyter/.venv/python./home/migue/Source/testJupyter/.venv/python.-m#ipykernel_launcher'
  },
  exitCode: 1,
  stdErr: '/home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher\n',
  vslsStack: [ CallSite {}, CallSite {}, CallSite {} ]
}
warn 16:56:56.155: Kernel Error, context = start Ip [Error]: The kernel died. Error: /home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher... View Jupyter [log](command:jupyter.viewOutput) for further details.
    at ChildProcess.<anonymous> (/home/migue/.vscode/extensions/ms-toolsai.jupyter-2023.2.1200692131/out/extension.node.js:17:90652)
    at ChildProcess.emit (node:events:538:35)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:291:12) {
  category: 'kerneldied',
  kernelConnectionMetadata: ea {
    kind: 'startUsingPythonInterpreter',
    kernelSpec: Yo {
      specFile: '/home/migue/.vscode/extensions/ms-toolsai.jupyter-2023.2.1200692131/temp/jupyter/kernels/pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9/kernel.json',
      interpreterPath: '/home/migue/Source/testJupyter/.venv/bin/python',
      isRegisteredByVSC: 'registeredByNewVersionOfExt',
      name: 'pythonjvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9',
      argv: [Array],
      language: 'python',
      executable: 'python',
      display_name: '.venv',
      metadata: [Object],
      env: {},
      interrupt_mode: undefined
    },
    interpreter: {
      id: '/home/migue/Source/testJupyter/.venv/bin/python',
      sysPrefix: '/home/migue/Source/testJupyter/.venv',
      envPath: [f],
      displayPath: [f],
      envName: '.venv',
      uri: [f],
      displayName: '.venv',
      envType: 'Venv',
      version: [Object]
    },
    id: '.jvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9./home/migue/Source/testJupyter/.venv/python./home/migue/Source/testJupyter/.venv/python.-m#ipykernel_launcher'
  },
  exitCode: 1,
  stdErr: '/home/migue/Source/testJupyter/.venv/bin/python: No module named ipykernel_launcher\n',
  vslsStack: [ CallSite {}, CallSite {}, CallSite {} ]
}
info 16:56:56.177: Process Execution: > ~/Source/testJupyter/.venv/bin/python -c "import ipykernel;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
> ~/Source/testJupyter/.venv/bin/python -c "import ipykernel;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
info 16:56:56.190: installMissingDependencies /home/migue/Source/testJupyter/.venv/bin/python, ui.disabled=false for resource '/home/migue/Source/testJupyter/example.ipynb'
info 16:56:56.215: Process Execution: > ~/Source/testJupyter/.venv/bin/python -c "import ipykernel;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
> ~/Source/testJupyter/.venv/bin/python -c "import ipykernel;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
info 16:56:56.253: Process Execution: > ~/Source/testJupyter/.venv/bin/python -c "import pip;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
> ~/Source/testJupyter/.venv/bin/python -c "import pip;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
info 16:56:59.427: Process Execution: > ~/Source/testJupyter/.venv/bin/python -c "import pip;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
> ~/Source/testJupyter/.venv/bin/python -c "import pip;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
info 16:56:59.490: Process Execution: > ~/Source/testJupyter/.venv/bin/python -m pip install -U ipykernel
> ~/Source/testJupyter/.venv/bin/python -m pip install -U ipykernel
info 16:57:05.827: Process Execution: > ~/Source/testJupyter/.venv/bin/python -c "import ipykernel;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
> ~/Source/testJupyter/.venv/bin/python -c "import ipykernel;print('6af208d0-cb9c-427f-b937-ff563e17efdf')"
info 16:57:05.980: Dispose Kernel '/home/migue/Source/testJupyter/example.ipynb' associated with '/home/migue/Source/testJupyter/example.ipynb'
info 16:57:05.996: Process Execution: > ~/Source/testJupyter/.venv/bin/python -m pip list
> ~/Source/testJupyter/.venv/bin/python -m pip list
info 16:57:05.996: Starting Jupyter Session startUsingPythonInterpreter, .jvsc74a57bd090267f21908a28b3126d4503a88c1074e428cd70bb13bea9e6d246a08553bad9./home/migue/Source/testJupyter/.venv/python./home/migue/Source/testJupyter/.venv/python.-m#ipykernel_launcher (Python Path: /home/migue/Source/testJupyter/.venv, EnvType: Venv, EnvName: '.venv', Version: 3.11.2 (main, Feb  8 2023, 00:00:00) [GCC 12.2.1 20221121 (Red Hat 12.2.1-4)]) for '/home/migue/Source/testJupyter/example.ipynb' (disableUI=false)
info 16:57:06.014: Process Execution: > ~/Source/testJupyter/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
> ~/Source/testJupyter/.venv/bin/python -c "import ipykernel; print(ipykernel.__version__); print("5dc3a68c-e34e-4080-9c3e-2a532b2ccb4d"); print(ipykernel.__file__)"
info 16:57:06.038: Process Execution: > ~/Source/testJupyter/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9011 --control=9009 --hb=9008 --Session.signature_scheme="hmac-sha256" --Session.key=b"c89cb212-dad2-4a36-984c-683070f7059f" --shell=9010 --transport="tcp" --iopub=9012 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-163533z7qVCsQYoFdK.json
> ~/Source/testJupyter/.venv/bin/python -m ipykernel_launcher --ip=127.0.0.1 --stdin=9011 --control=9009 --hb=9008 --Session.signature_scheme="hmac-sha256" --Session.key=b"c89cb212-dad2-4a36-984c-683070f7059f" --shell=9010 --transport="tcp" --iopub=9012 --f=/home/migue/.local/share/jupyter/runtime/kernel-v2-163533z7qVCsQYoFdK.json
info 16:57:06.038: Process Execution: cwd: ~/Source/testJupyter
cwd: ~/Source/testJupyter
info 16:57:06.169: ipykernel version & path 6.22.0, ~/Source/testJupyter/.venv/lib64/python3.11/site-packages/ipykernel/__init__.py for /home/migue/Source/testJupyter/.venv/bin/python
warn 16:57:06.465: StdErr from Kernel Process 0.00s - Debugger warning: It seems that frozen modules are being used, which may
0.00s - make the debugger miss breakpoints. Please pass -Xfrozen_modules=off
0.00s - to python to disable frozen modules.
0.00s - Note: Debugging will proceed. Set PYDEVD_DISABLE_FILE_VALIDATION=1 to disable this validation.

info 16:57:06.653: Started Kernel .venv (Python 3.11.2) (pid: 165783)

DonJayamanne · 2023-04-19T23:02:55Z

Thanks for the logs, I was able to repro this issue once.

MaddyGuthridge · 2023-04-21T13:40:52Z

Glad to hear it's not just me :) If there's anything else I can do to help, I'd love to do as much as I can

DonJayamanne · 2023-04-21T13:42:52Z

Thanks, at this stage, there's nothing else we need,
Next step is to try and find the root cause and fix it

DonJayamanne · 2024-12-10T04:57:15Z

@MaddyGuthridge Please can you test this in the latest version of VS Code and Jupyter extension.
In the previous version we updated some of the Jupyter Lab packages that may have addressed this issue.
Please let me know, given that I could not replicate this at my end I cannot verify this, but believe it may have been fxied.

vs-code-engineering · 2024-12-17T13:12:07Z

This issue has been closed automatically because it needs more information and has not had recent activity. See also our issue reporting guidelines.

Happy Coding!

MaddyGuthridge · 2025-01-11T09:54:37Z

Hello, @DonJayamanne ! Sorry for the delayed reply. I can confirm that this is still an issue. Occasionally, lines are not printed before calls to input

MaddyGuthridge added the bug Issue identified by VS Code Team member as probable bug label Mar 9, 2023

github-actions bot assigned rebornix Mar 9, 2023

DonJayamanne assigned DonJayamanne and unassigned rebornix Mar 9, 2023

DonJayamanne added the info-needed Issue requires more information from poster label Mar 9, 2023

DonJayamanne added notebook-output notebook-kernel-execution and removed info-needed Issue requires more information from poster labels Apr 21, 2023

DonJayamanne added this to the Backlog milestone Dec 4, 2023

DonJayamanne mentioned this issue Dec 12, 2023

VS Code Buffering Issue when Printing Outputs in Jupyter Notebooks #13565

Closed

DonJayamanne added notebook-execution Kernels issues (start/restart/switch/execution, install ipykernel) and removed notebook-kernel-execution notebook-output labels Dec 14, 2023

DonJayamanne added the info-needed Issue requires more information from poster label Dec 10, 2024

This was referenced Dec 11, 2024

Printing race condition? #15993

Closed

input and print logical error #15595

Closed

vs-code-engineering bot closed this as not planned Won't fix, can't repro, duplicate, stale Dec 17, 2024

DonJayamanne reopened this Jan 11, 2025

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Calls to `input()` should flush stdout when executing cells #13039

Calls to `input()` should flush stdout when executing cells #13039

MaddyGuthridge commented Mar 9, 2023 •

edited

Loading

DonJayamanne commented Mar 9, 2023

MaddyGuthridge commented Mar 10, 2023

DonJayamanne commented Mar 30, 2023

MaddyGuthridge commented Mar 31, 2023 •

edited

Loading

MaddyGuthridge commented Mar 31, 2023 •

edited

Loading

DonJayamanne commented Apr 19, 2023

MaddyGuthridge commented Apr 21, 2023

DonJayamanne commented Apr 21, 2023

DonJayamanne commented Dec 10, 2024

vs-code-engineering bot commented Dec 17, 2024

MaddyGuthridge commented Jan 11, 2025

Calls to input() should flush stdout when executing cells #13039

Calls to input() should flush stdout when executing cells #13039

Comments

MaddyGuthridge commented Mar 9, 2023 • edited Loading

Environment data

Expected behaviour

Actual behaviour

Steps to reproduce:

Logs

DonJayamanne commented Mar 9, 2023

MaddyGuthridge commented Mar 10, 2023

DonJayamanne commented Mar 30, 2023

MaddyGuthridge commented Mar 31, 2023 • edited Loading

MaddyGuthridge commented Mar 31, 2023 • edited Loading

DonJayamanne commented Apr 19, 2023

MaddyGuthridge commented Apr 21, 2023

DonJayamanne commented Apr 21, 2023

DonJayamanne commented Dec 10, 2024

vs-code-engineering bot commented Dec 17, 2024

MaddyGuthridge commented Jan 11, 2025

Calls to `input()` should flush stdout when executing cells #13039

Calls to `input()` should flush stdout when executing cells #13039

MaddyGuthridge commented Mar 9, 2023 •

edited

Loading

MaddyGuthridge commented Mar 31, 2023 •

edited

Loading

MaddyGuthridge commented Mar 31, 2023 •

edited

Loading