[Matplotlib-users] refresh a matplotlib plot when reruning a script

[zunbeltz <zun...@gm...>]

I have a script that fetchs data from a database and plot using 
something similar to

fig, (ax1, ax3) = plt.subplots(2, 1, sharex=False, sharey=False, num=fignum)
ax1.errorbar(...)
title(...)
ax2 = ax1.twiny()
ax4 = ax2.twiny()
...
plt.legent()
plt.draw()

Then, I call this script with plt.ion() and I use plt.show(block=True); 
so the plot stays opened.

Now, I want to rerun the script every second to get the updated data 
from the database. Is it posible to have the plot no blocking the script 
and being refresh?

I try to use block=False but this makes that the plot is not shown. I 
want to change my original script as little as possible. One posible 
idea I have is to pickle the plot (in the original script); and use 
another script that opens the pickled file every second.

TIA

Zunbeltz
(posted unsuccessfully at stackoverflow)