If you're using veusz (https://veusz.github.io/ https://veusz.github.io/) then you can interactively modify your plot, changing the appearance and investigating

If you're using veusz (https://veusz.github.io/ https://veusz.github.io/) then you can interactively modify your plot, changing the appearance and investigating relationships without writing or rerunning code. If your code takes a long time to run, you'll have to split your python code into two anyway: one part to do the calculation and the other to plot the results. Otherwise, it would take ages to modify plots. (I am the author of Veusz)