Update data so that redefine can be called multiple times

docs/examples/playground/app1.py

@@ -0,0 +1,22 @@
+from htmltools import a
+from shiny.express import ui
+from shinyobservable import Observable, ObservableRenderer
+
+# NOTEBOOK = "https://observablehq.com/@d3/zoomable-sunburst"
+NOTEBOOK = "https://observablehq.com/@eoda/test"
+
+ui.h1("Observable Notebook in Shiny")
+ui.div(a(NOTEBOOK, href=NOTEBOOK, target="_blank"))
+ui.hr()
+
+
+# Embed selected cells
+@ObservableRenderer
+def render_cells():
+    return Observable(NOTEBOOK, cells=[2, 3, 4])
+
+
+# Include entire notebook
+# @ObservableRenderer
+def render_notebook():
+    return Observable(NOTEBOOK)

docs/examples/playground/app2.py

@@ -0,0 +1,27 @@
+from htmltools import a
+from shiny.express import ui
+from shinyobservable import Observable, ObservableRenderer
+
+NOTEBOOK = "https://observablehq.com/@eoda/playground"
+
+ui.h1("Observable Notebook in Shiny")
+ui.div(a(NOTEBOOK, href=NOTEBOOK, target="_blank"))
+ui.hr()
+
+
+# Embed selected cells
+@ObservableRenderer
+def render_cells():
+    return (
+        Observable(NOTEBOOK, cells=["viewof echart", "echart"])
+        .redefine(
+            chartData=dict(x=["A", "B", "C", "D", "E"], y=[100, 150, 120, 40, 80])
+        )
+        .redefine(lineColor="green")
+    )
+
+
+# Include entire notebook
+# @ObservableRenderer
+def render_notebook():
+    return Observable(NOTEBOOK)

shinyobservable/_core.py

@@ -46,7 +46,7 @@ def redefine(self, **kwargs) -> Observable:
             ... )
             >>>
         """
-        self.data = kwargs
+        self.data.update(kwargs)
         return self
 
     def to_dict(self):