In Jupyter Notebook, when I highlight text either from within a cell in the notebook or from outside the notebook, Middle-Button click doesn't paste anything as it is supposed to do in many other applications in linux. Is there any setting that would allow one to be able to paste with a Middle-Button click into an Ipython or Jupyter Notebook?
I'm using the notebook in firefox if that matters.
The fact that you're using Firefox definitely matters. See this issue on CodeMirror (CodeMirror is the text editor that Juypter uses): Issue #931
In that thread, it references this Firefox issue: https://bugzilla.mozilla.org/show_bug.cgi?id=846674
It seems as though the issue has only recently been fixed, so it may take a little bit to trickle into CodeMirror. You may want to comment on the issue in CodeMirror to inform them that the issue has been fixed on FF and it might prompt them to investigate.
However, Jupyter doesn't automatically use the most recent version of CodeMirror so again you may have to wait a while. If this issue is truly critical then I suggest switching to another browser.
Related
I have started using VS Code for work instead of Anaconda and there are some weird observations which I am not able to figure out.
If I try to execute some code in a cell in the interactive window, many-a-times, only output remains available and the input code automatically gets hidden. For eg. I type the following and execute:-
And this is what I see at the window:-
Similarly, there are some variables which I have already defined but they don't show up in the Jupyer:Variables tab. For eg. there is a variable _link_name_to_index which is not visible in the tab as shown below:-
However, when I execute the same in the window, I can see the values of the dictionary as expected:-
Maybe it is just a matter of some settings, but I still couldn't find out which one. Also, I know I have put a lot of images, because it is not a code doubt as such, rather more of a tool doubt. I have taken only one particular example here, but I face this issue often. I am using VS Code version 1.75.0 in Ubuntu 20.04, using Python 3.9.12 in a virtual environment, if it helps.
This is a bug in the latest Version of VSCode (1.75). It is tracked in this issue. For now, the only option seems to be downgrading to v1.74.x
i am using Matplotlib with Pycharm in a Mac osx. When I am making a graph, and I code plt.show() pycharm opens another window. And if there is 2 graphs, to see the 2nd one I have to close the first one. And I want to see both together.
There is a option to show the two graph in the same window, where my code is?
Thanks very much.
This link may help:
IPython magic commands
Using Jupyter notebooks you can achieve what you want by using %matplotlib inline. It seems from the link above that PyCharm may have some way to enable this same functionality.
See also: Inline plots in the scientific view
I've lost a day's work in Jupyter Notebook because it didn't autosave. As I was working, I would click on File > Save and Checkpoint to be safe. I closed the notebook when I finished working and when I tried reopening it, I see that essentially all my work is gone and it says Last Checkpoint: a day ago (autosaved) next to the filename. I now realize that I had been working for a long time on the notebook with an orange box with some kind of error message. I'm sorry that I can't remember the specific message right now, but I think it was something involving POS or POST or POSIT ...?. I saw Trusted next to the error message, so I must've thought things were OK.
I tried opening the filename-checkpoint.ipynb file within the .ipynb_checkpoints folder but it's blank. I looked up a possible solution on Recovering from a Jupyter Disaster, but it requires SQL, which I don't know. Is there any hope for recovering my work? I realize that this is probably a rookie mistake, but I'm pretty new at this.
Thanks
PS: I'm running Python3 on MacOS
Hope you've already found how to recover lost work from Jupyter notebook work. If not, try the following:
Go to Anaconda Navigator (the green circle!)
Launch a Jupyter Lab
In Jupyter Lab, open a Terminal window
Launch iPython in the terminal by typing ipython and hitting enter
Hit Up arrow
All your code are stored in history and each cell compilation that you would've done in the past shows up there.
Copy+Paste it back to a new Jupyter notebook and you are ready to go again!
If you want to copy/paste.
After running terminal and ipython, page_up yo code you want. Click right button on a mouse, then Watch the elements code. Now you can select code, copy and paste it.
If you don't have Anaconda Navigator you can do access the same data the manual way:
open a new ipython terminal
type %history -g -f history.txt
This will output the entire history of edits which are saved in history.sqlite in your IPython profile folder. You can scroll down to the bottom to find your most recent edits.
You can also just explore the history.sqlite directly, which is located in your IPython profile. The profile should be inside .ipython in your user directory (windows and linux).
Thanks to Christian Long's answer on another question for providing this info.
I have a Jupyter notebook called "Visual Magnitude.ipynb" on my Windows box. I've used this notebook for several years. It's under CM control (perforce is our CM tool). Normally I don't have it checked out, so it's marked as read-only on the file system. Sometimes I open it up (knowing it's read-only), add a few cells, look at some results, and close it out, knowing the new cells won't be saved. This is ok.
But lately I've run into a situation where I forgot to check it out of perforce first, then added/modified some cells. When I went to save it Jupyter complained it was read-only. So I checked it out (thus removing the read-only status on the file system). Jupyter still doesn't recognize this. So I quit Jupyter all together and restart it with the notebook (which is now writable). But Jupyter refuses to recognize this and still treats it as if it were locked. Almost as if it's caching the file status in some location.
I've rebooted and still have the same problem. What am I missing to convince Jupyter that this notebook is now writable?
I'm using Jupyter 4.4.0.
It turns out that there was a hidden file .~Visual Magnitude.ipynb in the same folder that was still marked read only. Once I deleted that everything was fine.
When I open a saved IPython Notebook, I need to evaluate all the cells with imports, function definitions etc. to continue working on the session. It is convenient to click Cell > Run All to do this. But what If I do not want to re-evaluate all calculations? Do I need to pick the cells to evaluate by hand each time?
For this problem, Mathematica has the concept of "initialization cells". You can mark some cells in the notebook as initialization cell, and then perform "evaluate initialization cells" after opening the notebook.
Does the IPython Notebook have a similar solution?
First, when you open an IPython notebook, this does not mean the state of the kernel is lost,
unless you restarted the server or explicitly stop the kernel.
Otherwise, there are no marked cell, but there is a "run until here" on dev version.
Also if you are using dev version, using Cell Toolbar /metadata and I would say ~30 line of javascript it should be doable.
I suggest you open an enhancement request on main issue tracker. This could typically be made as an extension during a sprint and/or a blog post to explain internal of notebook.
If you're using the latest and greatest of the notebooks (mine is > 4.1), the feature you requested is available through an extension.
The extensions, as well as an interface that can be conveniently used to enable/disable each individual extension, can be installed as follows
$ git clone https://github.com/ipython-contrib/IPython-notebook-extensions.git
$ cd IPython-notebook-extensions
$ ./setup.py
When you have installed the extension, start the notebook server
$ cd ; jupyter-notebook < /dev/null > .jupyter.log 2>&1 &
and go to the extension management page
$ xdg-open http://localhost:8888/nbextensions
In the recently opened browser window, enable the "Initialization cells" extension.
If you open now a notebook of yours, in the toolbar you will see a new icon, similar to a hand-held calculator and in the View/Cell Toolbar a new entry, Initialisation Cell.
Enable this menu entry and click on the cells' toolbar which ones you want to mark as an initialization cell (possibly remove the cells' toolbar) and click on the icon previously described...
When you load a notebook, the initialization cells are automatically run, so that if you want you can place them in a convenient place, say the end of the notebook if you're like me...