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evhub / coconut

Simple, elegant, Pythonic functional programming.
http://coconut-lang.org
Apache License 2.0
4.05k stars 120 forks source link

Create `icoconut` command #769

Closed kxmh42 closed 1 year ago

kxmh42 commented 1 year ago

I use ipython a lot, and wanted to have something similar for Coconut. icoconut is basically ipython that interprets its input as Coconut by default. This is my first PR here, I hope I didn't miss anything from the guidelines :)

evhub commented 1 year ago

Coconut already has a Jupyter kernel? I don't understand what this PR is trying to add.

kxmh42 commented 1 year ago

Python has both ipython and jupyter console, and there are reasons why they have remained separate, even though they look almost identical. Jupyter is used in the data science community, but Python is a general-purpose language, and those who use it to write e.g. webapps, don't usually use Jupyter. But they do use a REPL like ipython. I think the same arguments apply to Coconut.

I just did a simple test on an environment with only Coconut. When I ran pip install ipython, it installed 15 additional packages, and my site-packages directory grew by 23 MB. When I ran pip install jupyter, which is required to run a Jupyter console, it installed 82 additional packages and site-packages grew by 150 MB.

Running coconut --jupyter console spawns a server and a client and takes up 150 MB of RAM. Running icoconut spawns only one process and uses about 70 MB of RAM. I know that bandwidth, storage and RAM are cheap these days, but it really seems like an overkill to install 82 additional packages just to have something as basic as a multiline REPL.

Given that ipython already supports the coconut magic, I think it would be useful to have a REPL that simply applies this magic to each input line/cell and has no additional dependencies.

BTW, when I run coconut --jupyter console in Python 3.11, I get the following warning:

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.

It's apparently caused by something from icoconut/root.py that is then imported into icoconut/__init__.py. When I moved my code out of the icoconut directory, the warning disappeared.

evhub commented 1 year ago

If you want a lightweight multiline repl, you can just use Coconut's built-in interpreter. And if you need something more heavyweight that has support for e.g. IPython magics, then you can use coconut --jupyter console. I don't think there's really a need for something like this in-between those two.

As for the warning, it's caused by Jupyter/IPython, not Coconut (see https://stackoverflow.com/questions/75114841/debugger-warning-from-ipython-frozen-modules-python-3-11). You can set the environment variable that the warning suggests to suppress it, but there's not much else that I can do about it on my end, at least as far as I'm aware.

kxmh42 commented 1 year ago

Understood. It seems that my arguments didn't sway you. But is there a way to go back to a multiline statement in Coconut's built-in interpreter?

evhub commented 1 year ago

I'm not exactly sure what you mean by "go back", but the interpreter has history that includes multiline statements, so if you press the up arrow you should be able to go back to a previous multiline statement that way.

Testing it now, it looks like the history keeps track of each line in a multiline statement separately unless you copy all of the lines in at once. That seems like it's a bug, though. Feel free to raise another issue for that.