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Description
My issue boils down to:
"Why does the figure not show immediately, but instead waits until the cell has completed running?"
%matplotlib widget
import matplotlib.pyplot as plt
from time import sleep
fig = plt.figure()
plt.plot([1,2,3])
sleep(2)
This behaviour is preventing fun uses, like dynamic plotting in a single cell:
%matplotlib widget
from matplotlib import pyplot as plt
from time import sleep
import numpy as np
fig = plt.figure()
for i in range(10):
x, y = np.random.random(2)
plt.scatter(x, y)
fig.canvas.draw()
sleep(0.1)
The previous code works if one splits it into two cells, placing the figure()
call in the first one:
# Cell 1
%matplotlib widget
from matplotlib import pyplot as plt
from time import sleep
import numpy as np
fig = plt.figure()
# Cell 2
for i in range(10):
x, y = np.random.random(2)
plt.scatter(x, y)
fig.canvas.draw()
sleep(0.1)
Edit: I also note that in the qt backend, there figure and plot are shown immediately, in contrast to the ipympl behaviour.
reszelaz and perrettetavin
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