feat: Implement support for multi-character comments in read_csv
#12519
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Sorry, I don't want this in polars. I am sorry about this one. This had to be documented better. |
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Ok, I see this one is only comments. This should be acceptable. |
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Thanks, can you also expose it to python as well? |
crates/polars-lazy/src/scan/csv.rs
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| #[must_use] | ||
| pub fn with_comment_char(mut self, comment_char: Option<u8>) -> Self { | ||
| self.comment_char = comment_char; | ||
| /// Set a single byte character as the comment character. |
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Should update the comment here (it mentions 'single-byte character')
crates/polars/tests/it/io/csv.rs
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| assert_eq!(df.shape(), (3, 5)); | ||
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| let csv = r"1,2,3,4,5 | ||
| ### this is a comment |
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This would work equally well with comment_char being a single "#" character; could you update the example to something that can only work with a multi-character comment prefix?
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We should also probably rename the |
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crates/polars-lazy/src/scan/csv.rs
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| if c.is_ascii() { | ||
| Some(CommentChar::Single(c as u8)) | ||
| } else { | ||
| None // Or handle non-ASCII characters as needed |
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Shouldn't that fallback to Multi then?
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@alexander-beedie regarding comment char/prefix. I've considered this approach as well. However, these changes will impact the user experience. If the Polars team is in agreement, I am ready to implement it. |
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You can use the decorator |
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This pull request introduces the capability to handle multi-character and single-byte comment identifiers in the read_csv function, addressing the feature request in issue #10583.