Where's the endless loop?

[Mark17]

The plots were blank because you called .plot instead of .bar. .plot draws a line graph. Normally lines are drawn between points, but since you plotted one point at a time there were no lines. Your plots actually contained points, but since you didn't specify a marker the points were invisible.

If you want to see what the plots look like with visible markers, change you plot command to this:

ax[0,0].plot(key,my_dict[key], marker='o')

You should really put aside some time to read the pyplot documentation.

I will. Thank you!