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

[Sam Ezeh]

Sam Ezeh <sam.z.ezeh at gmail.com> added the comment:

I've submitted a patch that introduces code that raises TypeError at construction if `fieldnames` is not a sequence

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keywords: +patch
nosy: +sam_ezeh
Added file: https://bugs.python.org/file50709/sam_ezeh.patch

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