Add remove_row and remove_rows to the DataTable

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+- Add `remove_row` and `remove_rows` methods to the DataTable https://github.com/Textualize/textual/discussions/2116
+
 ### Fixed
 
 - Fixed bindings persistance https://github.com/Textualize/textual/issues/1613

src/textual/widgets/_data_table.py

@@ -1287,6 +1287,28 @@ def add_row(
         self.check_idle()
         return row_key
 
+    def remove_row(self, row_key: RowKey) -> Self:
+        """Remove a row.
+        Args:
+            row_key: Key describing the specific row to remove
+
+        Returns:
+            The `DataTable` instance.
+        """
+        if row_key not in self._row_locations:
+            raise RowDoesNotExist(f"The row key {row_key!r} already exists.")
+
+        del self._row_locations[row_key]
+        del self._data[row_key]
+        del self.rows[row_key]
+
+        # TODO should the cursor be modified?
+
+        self._new_rows.remove(row_key)
+        self._update_count -= 1
+        self.check_idle()
+        return self
+
     def add_columns(self, *labels: TextType) -> list[ColumnKey]:
         """Add a number of columns.
 
@@ -1321,6 +1343,18 @@ def add_rows(self, rows: Iterable[Iterable[CellType]]) -> list[RowKey]:
             row_keys.append(row_key)
         return row_keys
 
+    def remove_rows(self, row_keys: Iterable[RowKey]) -> Self:
+        """Remove a number of rows.
+        Args:
+            row_keys: Iterable of keys. A key describes the specific row to remove.
+
+        Returns:
+            The `DataTable` instance.
+        """
+        for row_key in row_keys:
+            self.remove_row(row_key)
+        return self
+
     def on_idle(self) -> None:
         """Runs when the message pump is empty.