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Backport PR #22766 on branch v3.5.x (FIX: account for constant deprecations in Pillow 9.1) by meeseeksmachine · Pull Request #22780 · matplotlib/matplotlib · GitHub

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Backport PR #22766 on branch v3.5.x (FIX: account for constant deprecations in Pillow 9.1) #22780

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Merged
oscargus merged 2 commits into from
Apr 4, 2022
Conversation 5 Commits 2 Checks 0 Files changed
Merged

Backport PR #22766 on branch v3.5.x (FIX: account for constant deprecations in Pillow 9.1) #22780

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0205618
Backport PR #22766: FIX: account for constant deprecations in Pillow 9.1
oscargus Apr 4, 2022
520120b
Revert the clenaup changes
oscargus Apr 4, 2022
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3 changes: 3 additions & 0 deletions azure-pipelines.yml
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Expand Up @@ -134,6 +134,9 @@ stages:
- script: env
displayName: 'print env'

- script: pip list
displayName: 'print pip'

- bash: |
PYTHONFAULTHANDLER=1 python -m pytest --junitxml=junit/test-results.xml -raR --maxfail=50 --timeout=300 --durations=25 --cov-report= --cov=lib -n 2 ||
[[ "$PYTHON_VERSION" = 'Pre' ]]
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9 changes: 7 additions & 2 deletions lib/matplotlib/backends/backend_pdf.py
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Expand Up @@ -1718,8 +1718,13 @@ def _writeImg(self, data, id, smask=None):
# Convert to indexed color if there are 256 colors or fewer
# This can significantly reduce the file size
num_colors = len(img_colors)
img = img.convert(mode='P', dither=Image.NONE,
palette=Image.ADAPTIVE, colors=num_colors)
# These constants were converted to IntEnums and deprecated in
# Pillow 9.2
dither = getattr(Image, 'Dither', Image).NONE
pmode = getattr(Image, 'Palette', Image).ADAPTIVE
img = img.convert(
mode='P', dither=dither, palette=pmode, colors=num_colors
)
png_data, bit_depth, palette = self._writePng(img)
if bit_depth is None or palette is None:
raise RuntimeError("invalid PNG header")
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