Paste in the interactive session:

import matplotlib.pyplot as plt

def example():
    plt.figure()
    plt.plot(range(10), range(10))
    plt.show()

example()  # plot appears
plt.ion()
example()  # plot does not appear

Additional info:

• Do plt.ion(), then call example() many times. When quitting bpython3, the windows appear for a fraction of second.

bpython3 0.18 on Fedora 31, Python 3.7.6
bpython3 0.17.1 on Debian 10, Python 3.7.3