Look at whole spec name when determing dynamic watchers (#615)

* Look at whole dynamic name

* Added unit test

param/parameterized.py

@@ -1698,7 +1698,7 @@ def _update_deps(self_, attribute=None, init=False):
         for method, queued, on_init, constant, dynamic in type(obj).param._depends['watch']:
             # On initialization set up constant watchers; otherwise
             # clean up previous dynamic watchers for the updated attribute
-            dynamic = [d for d in dynamic if attribute is None or d.spec.startswith(attribute)]
+            dynamic = [d for d in dynamic if attribute is None or d.spec.split(".")[0] == attribute]
             if init:
                 constant_grouped = defaultdict(list)
                 for dep in _resolve_mcs_deps(obj, constant, []):

tests/API1/testwatch.py

@@ -830,3 +830,35 @@ def test_simple_trigger_two_params(self):
         self.assertEqual(args[1].old, 0)
         self.assertEqual(args[1].new, 0)
         self.assertEqual(args[1].type, 'triggered')
+
+    def test_sensitivity_of_widget_name(self):
+        # From: https://github.com/holoviz/param/issues/614
+
+        class ExampleWidget(param.Parameterized):
+            value = param.Number(default=1)
+
+
+        class Example(param.Parameterized):
+            da = param.Number(default=1)
+            date_picker = param.Parameter(ExampleWidget())
+            picker = param.Parameter(ExampleWidget())
+
+            @param.depends(
+                "date_picker.value",
+                "picker.value",
+                watch=True,
+            )
+            def load_data(self):
+                self.da += 1  # To trigger plot_time
+
+            @param.depends("da")
+            def plot_time(self):
+                return self.da
+
+
+        example = Example()
+        example.picker.value += 1
+        assert example.da == 2
+
+        example.picker.value += 1
+        assert example.da == 3