daft.Expression.json.query#
- Expression.json.query(jq_query: str) Expression[source]#
Query JSON data in a column using a JQ-style filter https://jqlang.github.io/jq/manual/ This expression uses jaq as the underlying executor, see 01mf02/jaq for the full list of supported filters.
Example
>>> df = daft.from_pydict({"col": ['{"a": 1}', '{"a": 2}', '{"a": 3}']}) >>> df.with_column("res", df["col"].json.query(".a")).collect() ╭──────────┬──────╮ │ col ┆ res │ │ --- ┆ --- │ │ Utf8 ┆ Utf8 │ ╞══════════╪══════╡ │ {"a": 1} ┆ 1 │ ├╌╌╌╌╌╌╌╌╌╌┼╌╌╌╌╌╌┤ │ {"a": 2} ┆ 2 │ ├╌╌╌╌╌╌╌╌╌╌┼╌╌╌╌╌╌┤ │ {"a": 3} ┆ 3 │ ╰──────────┴──────╯
- Parameters:
jq_query (str) – JQ query string
- Returns:
Expression representing the result of the JQ query as a column of JSON-compatible strings
- Return type:
Expression