collections.diff
Compare two lists of records by key: which were added, which removed, and which changed and in what fields.
diff_by_key in PythonTagged records
5 capabilities
collections.sort-by
Stably sort records by one key, ascending or descending, with a total order across mixed types.
sort_by in Python
collections.dedupe-by-key
Remove records that share a key value, keeping the first or the last of each, in input order.
dedupe_by_key in Python
collections.group-by-key
Group records by the value at one key, preserving input order inside each group.
group_by_key in Python
collections.search-text
Filter records by a case-insensitive substring match across named fields, in input order.
search_text in Python