Issue #20875: Merge from 3.3
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commit
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@ -96,7 +96,7 @@ class _PaddedFile:
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self._read -= len(prepend)
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return
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else:
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self._buffer = self._buffer[read:] + prepend
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self._buffer = self._buffer[self._read:] + prepend
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self._length = len(self._buffer)
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self._read = 0
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@ -421,6 +421,13 @@ class TestGzip(BaseTest):
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with gzip.GzipFile(fileobj=io.BytesIO(gzdata)) as f:
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self.assertEqual(f.read(), b'Test')
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def test_prepend_error(self):
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# See issue #20875
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with gzip.open(self.filename, "wb") as f:
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f.write(data1)
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with gzip.open(self.filename, "rb") as f:
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f.fileobj.prepend()
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class TestOpen(BaseTest):
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def test_binary_modes(self):
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uncompressed = data1 * 50
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@ -20,6 +20,9 @@ Core and Builtins
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Library
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-------
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- Issue #20875: Prevent possible gzip "'read' is not defined" NameError.
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Patch by Claudiu Popa.
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- Issue #11558: ``email.message.Message.attach`` now returns a more
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useful error message if ``attach`` is called on a message for which
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``is_multipart`` is False.
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