[issue27805] In Python 3, open('/dev/stdout', 'a') raises OSError with errno=ESPIPE

[Martin Panter]

Martin Panter added the comment:

Handling ESPIPE for append mode seems reasonable to me, even as a bug fix for existing versions.

But there is a similar problem with "r+" and "w+" modes and unseekable files (unless buffering=0). See Issue 20074. So we can’t say in general that Python 3 faithfully implements all aspects of Python 2’s / C’s / Posix’s file modes.

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