Add position to add method

ipyleaflet/leaflet.py

@@ -2676,13 +2676,15 @@ def __isub__(self, item):
     def __add__(self, item):
         return self.add(item)
 
-    def add(self, item):
+    def add(self, item, position=None):
         """Add an item on the map: either a layer or a control.
 
         Parameters
         ----------
         item: Layer or Control instance
             The layer or control to add.
+        position: int
+            The position to insert a Layer. If not specified, the layer is added to the end (on top).
         """
         if hasattr(item, 'as_leaflet_layer'):
             item = item.as_leaflet_layer()
@@ -2692,7 +2694,13 @@ def add(self, item):
                 item = basemap_to_tiles(item)
             if item.model_id in self._layer_ids:
                 raise LayerException('layer already on map: %r' % item)
-            self.layers = tuple([layer for layer in self.layers] + [item])
+
+            if position is not None:
+                if not isinstance(position, int) or position < 0 or position > len(self.layers):
+                    raise ValueError("Invalid position value")
+                self.layers = tuple(list(self.layers)[:position] + [item] + list(self.layers)[position:])
+            else:
+                self.layers = tuple([layer for layer in self.layers] + [item])
 
         elif isinstance(item, Control):
             if item.model_id in self._control_ids: