plt.show( ) not working (can't get figures to display in external window) when using jupyter QTconsole

[beatbox13]

Bug report

Bug summary

I am trying to have my figures open up in external windows using the plt.show() function. However, It gives me no output other than something such as:
<Figure size 640x480 with 1 Axes>

I am running linux ubuntu latest release and matplotlib 2.2.2,
qtconsole 4.3.1,
anaconda client 1.6.14
anaconda navigator 1.8.7
anaconda project 0.8.2,
jupyter 1.0.0
jupyter-client 5.2.3
jupyter-console 5.2.0
jupyter-core 4.4.0
jupyterlab 0.32.1
jupyterlab-launcher 0.10.5
python 3.6.5

import matplotlib.pyplot as plt
import numpy as np
import pandas as pd
fig= plt.figure()
ax= fig.add_subplot(111)
ax.plot([1, 2, 3, 4], [10, 20, 25, 30], color= "lightblue", linewidth= 3)
ax.scatter([0.3, 3.8, 1.2, 2.5], [11, 25, 9, 26], color= "darkgreen", marker= "^")
ax.set_xlim(0.5, 4.5)
plt.show()

Actual outcome

<Figure size 640x480 with 1 Axes>

Expected outcome

figure open in external window

Matplotlib version

• Operating system:
• Matplotlib version:
• Matplotlib backend (print(matplotlib.get_backend())):
• Python version:
• Jupyter version (if applicable):
• Other libraries:

Installed through anaconda

[ImportanceOfBeingErnest]

Qt console, as many other interactive interpreters based on IPython, will require a backend being set. You will find ways to do that all over the internet. In this case I suppose you want to add %matplotlib qt before starting to plot.
If you need further help with that, asking a question on stackoverflow, or via the mailing list are two options you have.

Closing because there seems no issue with matplotlib involved here.

[cpoptic]

Make sure you're running %matplotlibe inline or %matplotlibe notebook before importing the matplotlib library. Otherwise you'll just see a blank <Figure size 640x480 with 1 Axes>

See here: https://stackoverflow.com/questions/43545050/using-matplotlib-notebook-after-matplotlib-inline-in-jupyter-notebook-doesnt

[arthurmloureiro]

Hi, I have the same problem. I have tried all the suggestions online and for some reason, I cannot produce plots inline in any way. I have tried all backends possible. It was a recent update that broke this. Current verion is 2.2.9

[nesergen]

Same problem. Advices didn't help. JupyterLab Version 2.2.9

[jklymak]

@nesergen, please open a new issue with exactly what you are trying to do, and what did not help. Please also search the jupyter help.