You can simply call figure.canvas.draw() each time you append something new to the figure. This will refresh the plot.
from matplotlib import pyplot as plt
from builtins import input
fig = plt.figure()
ax = fig.gca()
fig.show()
block = False
for i in range(10):
ax.plot(i, i, 'ko')
fig.canvas.draw()
if block:
input('pause : press any key ...')
else:
plt.pause(0.1)
plt.close(fig)