Enumerate plots in matplotlib figure

Question

In a matplotlib figure I would like to enumerate all (sub)plots with a), b), c) and so on. Is there a way to do this automatically?

So far I use the individual plots

Answer 1

A super quick way to do this is to take advantage of the fact that chr() casts integers to characters. Since a-z fall in the range 97-122, one can do the following:

import matplotlib.pyplot as plt

fig,axs = plt.subplots(2,2)
for i,ax in enumerate(axs.flat, start=97):
  ax.plot([0,1],[0,1])
  ax.text(0.05,0.9,chr(i)+')', transform=ax.transAxes)

which produces: