[issue18219] csv.DictWriter is slow when writing files with large number of columns

[Mikhail Traskin]

Mikhail Traskin added the comment:

Any way is fine with me. If you prefer to avoid having public filedset property, please use the attached patch.

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Added file: http://bugs.python.org/file30605/csvdictwriter.v2.patch

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<http://bugs.python.org/issue18219>
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