interactive plots in debug mode, MacOS (maybe not a Spyder problem)?

[Andrew Voelkel]

Hi,

First, I have to say that overall, Spyder 4 is a joy and a huge improvement. Thanks to everyone for creating it.

I've been doing a lot of experimenting trying to get a Matlab type plotting experience. That means being able to get interactive plots up, and then with the plot up, be able to continue evaluating expressions, etc. 

This all works fine I just evaluate expressions or functions, but not in debug mode. If I'm stopped at a breakpoint after a plot command, the plot will not appear until I "continue" and exit debug mode.

Example code is above. I've tried various matplotlib backends. I also tried experimenting with the debug mode in Visual Studio Code instead of Spyder, and see similar issues. For that reason, I tend to think that this is not a Spyder problem per se but an issue with the underlying Python infrastructure.

But I figured there would be a lot of expertise here to understand the issue better.

Thanks for any help. This is kind of the last step to getting a Matlab type experience. It's frustrating not to be able to get there.

- Andy

[bcolsen]

Plotting while in debug is tricky to get right. See here for more information: https://github.com/ipython/ipykernel/pull/438

The current work around is to use plt.pause(10) this will render your graph and let you interact with is for the number or seconds given (in this case 10).