rendering issues when exception is raised before cell execution completes about ipympl HOT 3 OPEN

@odedbd Do you have a high-dpi screen?

from ipympl.

@tacaswell Nope, not HDPI

from ipympl.

I think I ran into something related to this issue. With the following code in the first cell

%matplotlib widget

from matplotlib import pyplot as plt
import numpy as np

x = np.linspace(-4, 4, 100)

fig, ax = plt.subplots(figsize=(2, 2))
ax.plot(x, x**2)

# plt.gcf().canvas.draw()

and in the second cell

raise Exception

when the notebook is started and we use "Cell->Run all" no figure is drawn with the current ipympl. When the cells are individually run after each other the figure shows up correctly. This is a bit annoying in longer notebooks where several figures are created and a typo in the last cell causes an exception and then no single figure shows up above.

By using the extra plt.gcf().canvas.draw() the figure shows up correctly even with the exception later.

from ipympl.