feat: add explode

Author: raisadz

narwhals_daft/dataframe.py

@@ -377,12 +377,14 @@ def group_by(
     ) -> DaftLazyGroupBy:
         return DaftLazyGroupBy(self, keys, drop_null_keys=drop_null_keys)
 
+    def explode(self, columns: Sequence[str]) -> DaftLazyFrame:
+        return self._with_native(self.native.explode(*columns))
+
     gather_every = not_implemented.deprecated(
         "`LazyFrame.gather_every` is deprecated and will be removed in a future version."
     )
     join_asof = not_implemented()
     tail = not_implemented.deprecated(
         "`LazyFrame.tail` is deprecated and will be removed in a future version."
     )
-    explode = not_implemented()
     sink_parquet = not_implemented()

run_tests.py

@@ -30,9 +30,7 @@
     "test_dt_to_string_iso_local_datetime_expr",
     "test_empty_scalar_reduction_with_columns",
     "test_explode_invalid_operation_error",
-    "test_explode_multiple_cols",
     "test_explode_shape_error",
-    "test_explode_single_col",
     "test_expr_binary",
     "test_expr_floordiv_by_zero",
     "test_expr_rfloordiv_by_zero",