8000 Pillow 7.0.0 Support · Issue #16083 · matplotlib/matplotlib · GitHub
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Pillow 7.0.0 Support #16083
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@marty-sullivan

Description

@marty-sullivan

Bug report

Pillow 7.0.0 is unsupported by pyplot.savefig when saving as jpeg.

Code for reproduction

With Pillow 7.0.0 installed:

import matplotlib.pyplot as plt

plt.plot(range(10))
plt.savefig('testplot.jpg')

The outcome is an exception is thrown, as follows:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.8/site-packages/matplotlib/pyplot.py", line 722, in savefig
    res = fig.savefig(*args, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/matplotlib/figure.py", line 2180, in savefig
    self.canvas.print_figure(fname, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/matplotlib/backend_bases.py", line 2021, in print_figure
    canvas = self._get_output_canvas(format)
  File "/usr/local/lib/python3.8/site-packages/matplotlib/backend_bases.py", line 1961, in _get_output_canvas
    raise ValueError(
ValueError: Format 'jpg' is not supported (supported formats: eps, pdf, pgf, png, ps, raw, rgba, svg, svgz)

The expected outcome is that savefig saves a jpeg image without an exception. This works fine with Pillow 6.2.2 and lower.

Matplotlib version

  • Operating system: Linux
  • Matplotlib version: 3.1.2
  • Python version: 3.8.1

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