Matplotlib not showing (non-Talos) figures when talos is imported

[ash09]

• [x] I'm up-to-date with the latest release: 0.5.0
• [x] I've confirmed that my Keras model works outside of Talos.

Python version: 3.6.8 OS: Archlinux

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plt.show() stops working as soon as talos is imported. This also impacts code that does not use talos at all. To demonstrate, I took an example from matplotlib documentation and only added import talos:

import matplotlib
import matplotlib.pyplot as plt
import numpy as np
import talos

# Data for plotting
t = np.arange(0.0, 2.0, 0.01)
s = 1 + np.sin(2 * np.pi * t)

fig, ax = plt.subplots()
ax.plot(t, s)

ax.set(xlabel='time (s)', ylabel='voltage (mV)',
       title='About as simple as it gets, folks')
ax.grid()

plt.savefig("test.png")
plt.show()

The figure is saved in a file but not shown. The program exits normally and there's no output.

Any help would be appreciated.

[mikkokotila]

Are you on a notebook or console?

[ash09]

I use only console (bash).

[mikkokotila]

Thanks. To confirm, I can replicate this issue also in notebook. This will get some priority (even though it does not effect working of Talos directly) as it silently effects other things. Good catch.

[mikkokotila]

This had to do with the way the backends were loaded for matplotlib. It is now fixed from v.0.6 onwards. Closing here.

[freezly]

Hi everybody,

before I create a new issue I want to ask if this is the same issue as mine: My code runs fine under Kubuntu 18.04. I want to run the same code and model on a raspberry pi and I'm connected via SSH. On Raspi I get an error as soon "import talos as ta" is called:

`Unable to init server: Could not connect: Connection refused Unable to init server: Verbindung ist gescheitert:Connection refused

(predictor.py:18596): Gdk-CRITICAL **: gdk_cursor_new_for_display: assertion 'GDK_IS_DISPLAY (display)' failed Traceback (most recent call last): File "/home/pi/git/repo/predictor.py", line 2, in import talos as ta File "/home/pi/.local/lib/python3.5/site-packages/talos/init.py", line 14, in from . import utils File "/home/pi/.local/lib/python3.5/site-packages/talos/utils/init.py", line 3, in from kerasplotlib import TrainingLog as live File "/home/pi/.local/lib/python3.5/site-packages/kerasplotlib/init.py", line 1, in from kerasplotlib.traininglog import TrainingLog File "/home/pi/.local/lib/python3.5/site-packages/kerasplotlib/traininglog.py", line 5, in import matplotlib.pyplot as plt File "/home/pi/.local/lib/python3.5/site-packages/matplotlib/pyplot.py", line 115, in _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup() File "/home/pi/.local/lib/python3.5/site-packages/matplotlib/backends/init.py", line 62, in pylab_setup [backend_name], 0) File "/home/pi/.local/lib/python3.5/site-packages/matplotlib/backends/backend_gtk3agg.py", line 9, in from . import backend_agg, backend_gtk3 File "/home/pi/.local/lib/python3.5/site-packages/matplotlib/backends/backend_gtk3.py", line 32, in cursors.MOVE : Gdk.Cursor.new(Gdk.CursorType.FLEUR), TypeError: constructor returned NULL`

Seems this is a problem like this: https://stackoverflow.com/questions/31328436/typeerror-constructor-returned-null-while-importing-pyplot-in-ssh

Is talos build to run on servers or only on PC's with an UI? Is this the same problem, or should I create a new Issue?

[mikkokotila]

@freezly this is not the same issue, can you create new ticket and we shall handle it there.

[freezly]

Thanks for fast response. I'll create a new issue.