How to delete leftover commands in IPython console? - python

I recently opened Spyder after a really long time, and my IPython console immediately showed some leftover commands? Do they affect my next code, and if they do, how can I get rid of them? Screenshot
EDIT Solved: all i had to do is turn off symbolic mathematics in preferences/ipython console/advanced settings. When I turn it back on, it shows again. I would like to know is there any better solution for this?

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Jupyter Notebook debugging not working on VS Code

I'm trying to activate the debugging functions that are now available on VSCode for Jupyter Notebooks but I'm having some problems with that.
In my interface I can see the button to 'Run by Line' next to every cell but when I click it nothing happens except the normal execution of the entire cell, but that mode is supposed to execute your cell line by line... I've tried putting some breakpoints even I know it is not necessary in that mode but still nothing.
As you can see here the buttons for debugging are shown a few seconds after hitting the 'Run by Line' button but they do nothing.
As a workaround to not being able to use that useful mode, I tried the standard debug mode of VSCode for Jupyter Notebooks which let you go breakpoint to breakpoint on your cell, the problem (I think it is) is that when I use that what VSCode does is open another tab with just the code of the cell I'm debugging in a temporary .py file, which is not the behaviour I would like to have, because I think it should do that on the Notebook tab itself without any new file...
Here I show you a screenshot of the temporary .py that it's created:
That's just the code of my notebook first cell!
Any help with this? I would like to solve both problems or at least one of them.
I've checked the requisites for the debug modes and make sure I fullfill everyone of them but I'm not so used to use the debug functionalities of VSCode so maybe I'm skipping something.
This is a current bug. It was notified to the dev team here:
https://github.com/microsoft/vscode-jupyter/issues/8258
The bug is caused by vscode using a shortened username. In my case GUILLE~1 instead of Guillermo.
The current solution available is to create a new user in your computer with a maximum length of 8 characters.

VScode run code selection

I just made the transition from Spyder to VScode for my python endeavours. Is there a way to run individual lines of code? That's how I used to do my on-the-spot debugging, but I can't find an option for it in VScode and really don't want to keep setting and removing breakpoints.
Thanks.
If you highlight some code, you can right-click or run the command, Run Selection/Line in Python Terminal.
We are also planning on implementing Ctrl-Enter to do the same thing and looking at Ctr-Enter executing the current line.
You can:
open a terminal at Terminal>New Terminal
Highlight the code you want to run
Hit Terminal>Run Selected Text
As for R you can hit CTRL Enter to execute the highlighted code. For python there's apparently no default shortcut (see below), but I am quite sure you can add yours.
In my ver of VSCode (1.25), shift+enter will run selection. Note that you will want to have your integrated terminal running python.
One way you can do it is through the Integrated Terminal. Here is the guide to open/use it: https://code.visualstudio.com/docs/editor/integrated-terminal
After that, type python3 or python since it is depending on what version you are using. Then, copy and paste the fraction of code you want to run into the terminal. It now has the same functionality as the console in Spyder. Hope this helps.
I'm still trying to figure out how to make vscode do what I need (interactive python plots), but I can offer a more complete answer to the question at hand than what has been given so far:
1- Evaluate current selection in debug terminal is an option that is not enabled by default, so you may want to bind the 'editor.debug.action.selectionToRepl' action to whatever keyboard shortcut you choose (I'm using F9). As of today, there still appears to be no option to evaluate current line while debugging, only current selection.
2- Evaluate current line or selection in python terminal is enabled by default, but I'm on Windows where this isn't doing what I would expect - it evaluates in a new runtime, which does no good if you're trying to debug an existing runtime. So I can't say much about how useful this option is, or even if it is necessary since anytime you'd want to evaluate line-by-line, you'll be in debug mode anyway and sending to debug console as in 1 above. The Windows issue might have something to do with the settings.json entry
"terminal.integrated.inheritEnv": true,
not having an affect in Windows as of yet, per vscode documentation.

How to run code selection in Spyder without changing the active window to IPython console?

This is mostly a question regarding work-flow in Spyder, and not a pure programming question. If anyone thinks it has no place here, then please let me know and I'll remove it.
Here we go:
I'm running Spyder on a Windows 64-bit operating system. The interaction between the Spyder IDE and IPython console depends on how you choose to run your code, and I would like to specify how this interaction works.
Among several options to run parts of the code, the difference between the following two is what puzzles me:
Option 1 - Select parts of the code and hit F9
This runs the selected code. No surprise there.
Hit F9 again, and the same selection is executed once more.
Option 2 - Run the same selection using Cells (#%%) and Ctrl+Enter
The code is run just like before. But hit Ctrl-Enter again, and nothing happens. Probably because the IPython console now is the active window.
I would like to find some way of changing this so I can use Ctrl+Enter and run the cell contents multiple times without having to make the Spyder IDE the active window by manually clicking on it. I don't know if this is possible at all. Googling and messing around in the settings under Run / configure and Tools / Preferences has so far been useless.
Thank you for any suggestions!
P.S
In case you're wondering why this is such a big deal to me, I'm rendering multiple charts and exporting them to Power Point with minor changes each time the code is run. This way, new parts of the charts (lines, textboxes, etc) are revealed when I'm working my way through a finished Power Point presentation. And for my basic data science needs, this has turned out to be a pretty much optimal work-flow. Except, of course, that I have to manually select the Spyder IDE each time I run different selections of the code.
In the latest spyder version, the keyboard shortcut to run the highlighted lines of code is F9 but it doesn't seem to work.
Go change it from TOOLS>>PREFERENCES>>KEYBOARD SHORTCUTS then double click on any shortcut you want to change and change with your shortcut. But be very careful if you used the same shortcut that is used for any other work then for that it will remove.
I changed the shortcut for 'run selection' from F9 to ctrl + Enter
in Option 2, you should use Shift+Enter instead

IdeaVim with Jupyter Notebook on PyCharm

I am trying out IntelliJ. I have installed the Python plugin, and IdeaVim.
I cannot navigate properly across Jupyter Notebook cells using hj. I mean, on normal mode, I cannot go to the next (or previous) cell, even if there is one, using hj.
Is there a way to do it without the mouse, possibly rebindable? I have read the tutorial and tried to find something in the program, but could not.
Ideavim plugin doesn't seem to support Pycharm's notebook implementation as of right now :(
There's an open issue marked as "bug" on Ideavim's issue tracker that was opened back in 2015 and it seems like it doesn't have any progress made since.
However according to the comment in the issue thread you can:
funny way to get into the command mode is type something so that the suggestion panel appears, now press "esc" you will get into Vim command mode
So this might indicate that this could be solved and updated in the future.
As an alternative you can try out jupyter-vim-binding, however it doesn't work with Pycharm either.

Python - I can't see my what my error is because the window disappears immediately

I am pretty new to Python and I have been pretty annoyed with this problem. I am not sure if this matters, but I run my .py file with Python 2.7.6 with python installed on my computer, not using it on any online thing or other program. Every time I come across an error, my program works fine until it comes to the error, but the window disappears right before I can possibly read whatever the error said it was... Anyways, I haven't been able to find out what is wrong with my programming, and I am tired of guessing and guessing what is wrong. How can I extend the time so I can read the error message? Or something like that? Thanks
You should run it from command window/terminal instead of double clicking on the file.
Yes, as #shortfellow said, running it from the terminal should work:
python your_file.py
Another tip that helps in Python, if you are having a hard time with errors, is to use iPython for debugging/testing code on the spot. You can give it a try.
http://ipython.org/

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