[New-bugs-announce] [issue27842] Order CSV header fields

[Steve Holden]

New submission from Steve Holden:

It's sometimes annoying that a csv.DictReader doesn't retain the field ordering given in the first line of the file. Sometimes it matters.

This patch converts the reader so that it returns an OrderedDict rather than a plain dict, thereby retaining the ordering.

All tests still pass (though I haven't yet added a test to verify that the field ordering *is* retained - didn't think it was worth it if the patch won't be added, but will happily add that test otherwise).

I have updated the documentation, but was unable in the time available to find out how to correctly reference the OrderedDict class so that it was correctly hyperlinked.

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components: Library (Lib)
files: csv.patch
hgrepos: 353
keywords: needs review, patch
messages: 273486
nosy: holdenweb
priority: normal
severity: normal
stage: patch review
status: open
title: Order CSV header fields
versions: Python 3.6
Added file: http://bugs.python.org/file44202/csv.patch

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<http://bugs.python.org/issue27842>
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