Module notes 

What datui noticed about a dataset while doing what it was already doing.

A note never costs a request or a scan of its own: every one here is read off the footers the schema and the row count already needed. Notes are never alarming — no pop-up, no error styling — and every one says what it is based on, so “in 1 of 3 files” is never mistaken for a claim about files datui has not looked at.

A note is one sentence and the line it rests on. Review after review found false or empty statements here, and every one of them was in prose that went beyond the sentence: a denominator over the wrong population, an explanatory line that contradicted the note above it, a type named by a word two types share. What is left is what can be checked: one claim per note, and one function deciding the only ratio any of them states.

Structs

Note

One thing datui noticed.

Functions

from_dataset

What the footers said, as notes. Empty when every file agrees, which is the common case and the one where there is nothing to say.

from_the_open

What the open itself has to say, before a footer has been read.

left_out_note

Rows a filter or sort leaves out, because the column it names is not read from the files those rows came from.

map_caches

The cache-*.arrow files map() wrote beside a Hugging Face cache’s splits, which the read left out: their columns are the mapping’s, not the split’s.

merged

Every note the panel shows — what the open did, what the footers said, then what the view leaves out — with the one fact the first two both report said once.

no_header

The files a read of several passed over because they hold no header: empty, blank, or nothing but NUL padding.

some_names

names, the first few of them, joined, and an ellipsis for the rest.