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

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

I merged PR 12306. Thanks Ashish Nitin Patil for the initial patch, thanks Rémi Lapeyre to converting it to a PR, thanks Logan for the initial bug report ;-)

Sadly, this change is a new feature and so cannot be backported to 2.7 or 3.7. The workaround is override the method:

    def writeheader(self):
        header = dict(zip(self.fieldnames, self.fieldnames))
        return self.writerow(header)

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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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