warning about too many open figures

Question

In a script where I create many figures with fix, ax = plt.subplots(...), I get the warning RuntimeWarning: More than 20 figures have been opened. Figures c

Answer 1

If you intend to knowingly keep many plots in memory, but don't want to be warned about it, you can update your options prior to generating figures.

import matplotlib.pyplot as plt
plt.rcParams.update({'figure.max_open_warning': 0})

This will prevent the warning from being emitted without changing anything about the way memory is managed.