Matplotlib forced on qt4 with Spyder

Hello everybody, I recently reinstalled Anaconda, since I was still using python 2 and since, I can’t plot anything with Matplotlib even the simplest code: import matplotlib.pyplot as pyplot pyplot.plot([1, 2, 3, 4, 5, 6],[4, 5, 1, 3, 6, 7]) pyplot.show() raises an exception: "Cannot load backend ‘Qt4Agg’ which requires the ‘qt4’ interactive framework, as ‘qt5’ is currently running "

No matter what I do to force matlab on qt5, each time I run my code, it wants to go on qt4. On the other hand, everything works fine on Conda (but it is less convenient to code there) Do any of you happens to know the why and how of this problem?

Versions

Spyder version: 3.3.6 Python version: 3.7 Qt version: 5.9.6 PyQt version: 5.9.2 Operating System name/version: win32 - Windows 10

Dependencies

IPython >=4.0     :  7.6.1 (OK)
cython >=0.21     :  0.29.12 (OK)
jedi >=0.9.0      :  0.13.3 (OK)
matplotlib >=2.0.0:  3.1.1 (OK)
nbconvert >=4.0   :  5.5.0 (OK)
numpy >=1.7       :  1.16.4 (OK)
pandas >=0.13.1   :  0.24.2 (OK)
pycodestyle >=2.3 :  2.5.0 (OK)
pyflakes >=0.6.0  :  2.1.1 (OK)
pygments >=2.0    :  2.4.2 (OK)
pylint >=0.25     :  2.3.1 (OK)
qtconsole >=4.2.0 :  4.5.1 (OK)
rope >=0.9.4      :  0.14.0 (OK)
sphinx >=0.6.6    :  2.1.2 (OK)
sympy >=0.7.3     :  1.4 (OK)

[ajaykumar2017]

Hi I am getting Error Cannot load backend ‘Qt4Agg’ which requires the ‘qt4’ interactive framework, as ‘qt5’ is currently running Tell me how to resolve it…?

[ccordoba12]

I’m sorry but I don’t know what happens in your case. The only solution that occurs to me is to go to

Tools > Preferences > IPython console > Graphics

deactivate the option called Activate support and run directly %matplotlib qt5 in our consoles.