maplotlib.pyplot.show() works with python but not with jupyter console

Question

I have looked at this question and also this one. It looks like for me, matplotlib.pyplot.show() shows a figure from python, but not from jupyter console.

matplotlib.matplotlib_fname() returns the same matplotlibrc file location for both.

However, when I try to find the backend being used with matplotlib.rcParams['backend'] jupyter console tells me - 'module://ipykernel.pylab.backend_inline', regardless of which backend I have modified the matplotlibrc file to use.

Python on the other hand, correctly shows the backend I'm using; currently 'TkAgg'.

I installed matplotlib using python -mpip install -U matplotlib.

I'm using the following versions:

Windows 10
Jupyter console 5.2.0
Python 2.7.14
IPython 5.5.0

I can make do with using python, but it would be nice to figure this out for jupyter console as well.

ImportanceOfBeingErnest · Accepted Answer · 2018-03-25 08:28:28Z

2

First note that plt.show() works as expected, also in Juypter.

This uses the default 'module://ipykernel.pylab.backend_inline' backend. This backend is set by Jupyter, independently of the rcParams setting.

You may set the backend using matplotlib.use()

import matplotlib
matplotlib.use("TkAgg")
import matplotlib.pyplot as plt
plt.plot([1,2,3])
plt.show()

or just using IPython magic %matplotlib backendname

%matplotlib tk
import matplotlib.pyplot as plt
plt.plot([1,2,3])
plt.show()

You may change the backend using pyplot.switch_backend()

plt.switch_backend("TkAgg")
plt.plot([1,2,3])
plt.show()

or using the same IPython magic

%matplotlib tk
plt.plot([1,2,3])
plt.show()

If you want to set the backend to be used by default, see this question: Change default backend for matplotlib in Jupyter Ipython

answered Mar 25, 2018 at 8:28

ImportanceOfBeingErnest

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