[issue32547] csv.DictWriter emits strange errors if fieldnames is an iterator

[Sam Ezeh]

Change by Sam Ezeh <sam.z.ezeh at gmail.com>:


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pull_requests: +30300
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/32225

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32547>
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