[issue27497] csv module: Add return value to DictWriter.writeheader

[SilentGhost]

SilentGhost <ghost.adh at runbox.com> added the comment:

Michael, there is a up-to-date PR that's waiting for approval.

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nosy: +SilentGhost

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue27497>
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