Feature request: sniff csv quoting and lineterminator
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- Dominant language
- Python
- Stars
- 77.2k
- Forks
- 35.9k
- PR merge metrics
- PR metrics pending
Description
If you read a csv file, alter the data and then write it back, it would be very nice to recreate also the quoting behaviour. So e.g. if the file is quoted in style csv.QUOTE_NONNUMERIC, it would be very useful to have the quoting property set correctly in the dialect object returned by csv.Sniffer().sniff.
Also, I just figured out that the line terminator is also hard-coded to "\r\n". Would also be nice to be adaptive...
Linked PRs
- gh-134416
Contributor guide
First steps
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Research direction
Start in Lib/csv.py around csv.Sniffer().sniff, the entry point named in the issue, and review linked PR gh-134416 for the current work. The change is complete when sniffed dialects preserve the input quoting behavior and line terminator instead of using fixed defaults.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- data
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100