Using >> in Spyder

[ce88888]

Hello there

I'm a hobbyist so forgive me if this is a silly question. I've previously used R a lot and so was thankful when I came across datar when I started working in python. I still haven't settled on a dev environment and have been using VSCode and Spyder. In Spyder (love the variable explorer compared to VSCode!), I can' t execute a cell which has piping in it - I suppose for the reasons you outline under 'caveat'. The same works fine when I paste this into a VSCode notebook. If I execute the same code in the Spyder console it works fine (presumably that's IPython. I've tried google but can't figure out how I switch the main execution of individual cells in Spyder to IPython. Have you come across this issue and could you point me towards a fix?

Many thanks!
C.

[pwwang]

Hi,

It's not silly at all. We are able to retrieve the AST at runtime in VSCode/Jupyter/IPython, allowing us to run the datar code smoothly. Seeing the AST allows us to tell whether the verbs are called in the form of df >> verb(...) or verb(df, ...). I am not a Spyder user, but I guess Spyder is blind to AST at runtime. In such a case, you will need to tell datar that you are running in a "blind" environment:

from datar import options
options(assume_all_piping=True)

from datar.all import nrow
from datar.datasets import mtcars

print(mtcars >> nrow())

You can check out some details here: https://pwwang.github.io/datar/caveats/blind/

If you don't want to change the options every time, you can save it to a configuration file. See here:
https://pwwang.github.io/datar/options/#configuration-files

[ce88888]

Thank you - I will need to look into this further as I had tried with options way and it still seemed to have an issue, but perhaps I had another problem in the code.

[pwwang]

Let me know if there is anything I can help with, if you don't mind posting your code.