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

[Mikhail Traskin]

Mikhail Traskin added the comment:

Peter, thank you for letting me know that views work with list, I was not aware of this. This is indeed the best solution and it also keeps the DictWriter interface unchanged.

Terry, attached patch contains the DictWriter change and a test case in test_csv.py.

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Added file: http://bugs.python.org/file31570/csvdictwriter.v4.patch

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