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Commit 9ff8910

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anntzeranntzer
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Replace pgf image-streaming warning by error.
Saving a pgf file with images to an in-memory buffer (`import io; imshow([[1, 2]]); savefig(io.BytesIO(), format="pgf")`) currently warns that this is not possible (because the image needs to be written to the filesyste), but in fact an exception gets raised immediately after when trying to construct `Path(self.fh.name)`, so we may as well replace the original warning by an exception.
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‎lib/matplotlib/backends/backend_pgf.py

Copy file name to clipboardExpand all lines: lib/matplotlib/backends/backend_pgf.py
+2-2Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -624,9 +624,9 @@ def draw_image(self, gc, x, y, im, transform=None):
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return
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if not os.path.exists(getattr(self.fh, "name", "")):
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_api.warn_external(
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raise ValueError(
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"streamed pgf-code does not support raster graphics, consider "
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"using the pgf-to-pdf option.")
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"using the pgf-to-pdf option")
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# save the images to png files
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path = pathlib.Path(self.fh.name)

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