I find this mildly irritating as I am unable to see the reason.
The return statement (within a function) in VS Code (+ bash terminal) doesn't return any value, unless I explicit say print(function()), like given in the code below.
This doesn't happen in Spyder, it promptly returns the value in the console.
Why is this so? What am I missing?
The main reason is that in Spyder you use IPython console. It is an interactive shell which provides extra features. Since in your bash terminal the Python console is used instead of IPython, it does not return the value of the function when it is prompted.
In this question, the differences between IPython and Python consoles are discussed.
It is possible to use IPython in VS Code as well https://code.visualstudio.com/docs/python/jupyter-support-py
You may have to enable Python Data Science features in settings though (considered still experimental as of September 2020):
open the settings (press Ctrl+,) then search for datascience options
Personally, I find "Send Selection To Interactive Window" option very useful.
"python.dataScience.sendSelectionToInteractiveWindow": true,
Determines if selected code in a python file go to the terminal or to the Python interactive window when hitting Shift+Enter
Related
I'd like to send code I have selected from the editor to the interpreter running in the debugging console during an active debugging session. Can I do this in VSCode? If so, how?
Update 1
While Mark (accepted answer) provided what seems to be the right command (it works for me from the contextual menu with the mouse), this isn't working for me yet as a keyboard binding, and I reported this issue here.
Update 2
This started working again as of April 21, 2020 (latest Insiders version).
See https://code.visualstudio.com/docs/python/editing#_run-selectionline-in-terminal-repl
Run Selection/Line in Terminal (REPL)
The Python: Run Selection/Line in Python Terminal command
(Shift+Enter) is a simple way to take whatever code is selected, or
the code on the current line if there is no selection, and run it in
the Python Terminal. An identical Run Selection/Line in Python
Terminal command is also available on the context menu for a selection
in the editor.
VS Code automatically removes indents based on the first non-empty
line of the selection, shifting all other lines left accordingly.
Source code that runs in the terminal/REPL is cumulative until the
current instance of the terminal is closed.
The command opens the Python Terminal if necessary; you can also open
the interactive REPL environment directly using the Python: Start REPL
command. (Initial startup might take a few moments especially if the
first statement you run is an import.)
On first use of the Python: Run Selection/Line in Python Terminal
command, VS Code may send the text to the REPL before that environment
is ready, in which case the selection or line is not run. If you
encounter this behavior, try the command again when the REPL has
finished loading.
And see Use IPython REPL in VS Code for info about the IPython REPL.
--------- generic info for other languages -------------------------------------------------------------
It sounds like you want to send it the repl. There is an unbound command:
editor.debug.action.selectionToRepl
which will send selected text to the debug repl.
{
"key": "alt+y", // whatever you want here
"command": "editor.debug.action.selectionToRepl"
},
No, you cannot send a selection of code to the debugger. You need to debug the whole file or use the Interactive Window support to debug a specific cell.
I would like that iPython run automatically when I launch VSC instead of typing ipython and press enter in the terminal. The answer here How to set ipython/jupyter as the default python terminal for vscode? doesn't work as it is for windows but it shouldn't be really different. Also, is there something similar to the 'Execute' button in Spyder instead of typing %run filename ? Thanks !
I presume you mean you want to run the "Python Interactive Window" and not just an iPython console on startup
There is currently no way to run it on startup. At least no way without writing another extension that would run a command when opening a workspace. It would be simple for us to add one though. Probably a workspace setting. Can you log an issue here:
https://github.com/Microsoft/vscode-python/issues/new
For you second question, 'Execute' in spyder, we have 'Run Current File in Python Interactive Window'. This works on any python file. You can get to it through the context menu on a file or through the command palette.
Sadly the nice workflow of spyder is not provided by any official extension at the moment (as far as I know).
But you can implement the basics easily on your own by writing an extension. Even with no experience in TypeScript you can quickly build an extension which starts an IPython console as soon as you open a python file. I also managed to execute a startup script which implements the runfile method. VS Code also allows keybindings for your functions, so that you can almost work like you can with spyder.
Spyder modified the IPython terminal quite a bit though, so it won't feel exactly the same. But after all, everything there is open source so you could implement it yourself, which is what I'm trying to do in my free time.
I would like to know if there is way to figure out (from the IPython console) the .py script that was used to run/execute the python commands interactively and thus got printed into the Ipython console.
For eg.
From the below screenshot, looking at the 3+3 in the Ipython console, I can see that it came in when command from untitled2.py was executed.
However when the scripts get long, and IPython output gets long and you are often shifting scripts on the left side, it can be hard to keep track.
So i was wondering if there is a way i can quickly execute some command or view some setting on Ipython console that can tell me that the above line came from untitled.py.
(Spyder maintainer here) There's no way to know from which Editor you're executing some portion of code, sorry.
However, you could use dedicated consoles (under Preferences > Run > Execute in a dedicated console) to have one console per file you execute, as long as you use F5 to run each one of them.
You could edit each .py script, so the first thing it does is to print its name and functionality.
untitled2.py:
print('untitled2.py')
...
I am writing Python scripts in Pycharm with IPython installed. So I can use Python Console in Pycharm to type Python commands and check the immediate output of the codes. However, when I run a script file after pressing 'Run' button (Shift+F10), all the variables and functions are not visible to the Python Console. This is, however, the feature of Spyder, another popular Python IDE. So here is my question: how can I configure Pycharm so that running a Python script file is visible for Python Console? Thanks
You could also run the part of your code you want to test/check in the console by selecting it and then right clicking and clicking on "Execute Selection in Console Alt-Shift-E". That's what I use sometimes when the debugger is not helpful. After running the code (you can also just "run" functions or classes) the console knows the functions and you can use the same features that Spyder has. However, be aware that when you change the code you need to run it in the console once to update the console definitions!
You can not. But you can use pdb (which will break code execution where you need it and you will be able to do the same things, as in the Python Console).
And, which is better and more powerful, you can use PyCharm's debugger. It represents all available variables in tree-like structures and is really handy.
so far I used the Komodo IDE for Python development, but I'm now testing Eclipse with PyDev. Everything works fine, but there is one Komodo feature that I'm missing.
In Komodo I can inspect the running application in a debugger shell. I.e. after hitting a breakpoint I can not only read the content of variables, but I can execute arbitrary Python code (e.g. changing the value of variables) and then continue program execution.
PyDev has also some interactive shell during debugging, but I can only read variables and not change their content. Is this feature not available in PyDev or am I missing something here?
Many thanks,
Axel
As you've seen, you can just use the console directly:
http://pydev.org/manual_adv_debug_console.html
Now, you can also connect the interactive console (which is a bit more advanced) by selecting a stack frame to attach it:
http://pydev.org/manual_adv_interactive_console.html
Yes you can do that. Just type in the console what ever commands you want :). I usually have to right click then
Debug As >> Python run
PyDev is a little bit quirky, but you get used to it.