remove double query when display widget

Author: shuoweil

bigframes/display/anywidget.py

@@ -63,8 +63,9 @@ def __init__(self, dataframe: bigframes.dataframe.DataFrame):
                 "Please `pip install anywidget traitlets` or `pip install 'bigframes[anywidget]'` to use TableWidget."
             )
 
-        super().__init__()
         self._dataframe = dataframe
+        self._initializing = True
+        super().__init__()
 
         # Initialize attributes that might be needed by observers first
         self._table_id = str(uuid.uuid4())
@@ -89,12 +90,10 @@ def __init__(self, dataframe: bigframes.dataframe.DataFrame):
         # Create pandas batches from the ExecuteResult
         self._batches = execute_result.to_pandas_batches(page_size=initial_page_size)
 
-        # Set page_size after _batches is available, but avoid triggering observers
-        # by setting the underlying traitlet value directly
-        self._trait_values["page_size"] = initial_page_size
-        self._trait_notifiers["page_size"] = {}  # Initialize notifiers if needed
+        self.page_size = initial_page_size
 
         self._set_table_html()
+        self._initializing = False
 
     @functools.cached_property
     def _esm(self):
@@ -227,11 +226,15 @@ def _set_table_html(self):
     @traitlets.observe("page")
     def _page_changed(self, _change: Dict[str, Any]):
         """Handler for when the page number is changed from the frontend."""
+        if self._initializing:
+            return
         self._set_table_html()
 
     @traitlets.observe("page_size")
     def _page_size_changed(self, _change: Dict[str, Any]):
         """Handler for when the page size is changed from the frontend."""
+        if self._initializing:
+            return
         # Reset the page to 0 when page size changes to avoid invalid page states
         self.page = 0
 

notebooks/dataframes/anywidget_mode.ipynb

@@ -130,7 +130,7 @@
     {
      "data": {
       "text/html": [
-       "Query job 087c4276-8c26-467f-852b-c0d31848f666 is DONE. 171.4 MB processed. <a target=\"_blank\" href=\"https://console.cloud.google.com/bigquery?project=bigframes-dev&j=bq:US:087c4276-8c26-467f-852b-c0d31848f666&page=queryresults\">Open Job</a>"
+       "Query job 1171b7b3-3f65-4165-a69d-69dad5a100d1 is DONE. 171.4 MB processed. <a target=\"_blank\" href=\"https://console.cloud.google.com/bigquery?project=bigframes-dev&j=bq:US:1171b7b3-3f65-4165-a69d-69dad5a100d1&page=queryresults\">Open Job</a>"
       ],
       "text/plain": [
        "<IPython.core.display.HTML object>"
@@ -142,7 +142,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "c2a4111b39c3462a8d0f4f2e4a01635b",
+       "model_id": "6b70bf0e30a04a3cab11e03b2ed80856",
        "version_major": 2,
        "version_minor": 1
       },
@@ -186,7 +186,7 @@
     {
      "data": {
       "text/html": [
-       "Query job 86d748cf-699c-407c-8eba-2d6421375aad is DONE. 171.4 MB processed. <a target=\"_blank\" href=\"https://console.cloud.google.com/bigquery?project=bigframes-dev&j=bq:US:86d748cf-699c-407c-8eba-2d6421375aad&page=queryresults\">Open Job</a>"
+       "Query job 3100859b-c57c-42fe-a5fb-abb4f2f25db2 is DONE. 171.4 MB processed. <a target=\"_blank\" href=\"https://console.cloud.google.com/bigquery?project=bigframes-dev&j=bq:US:3100859b-c57c-42fe-a5fb-abb4f2f25db2&page=queryresults\">Open Job</a>"
       ],
       "text/plain": [
        "<IPython.core.display.HTML object>"
@@ -205,7 +205,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "401985bd2b3f40f3a2f7e48eeabb272d",
+       "model_id": "4714b0794f55435a8d3e136517158a5c",
        "version_major": 2,
        "version_minor": 1
       },
@@ -293,7 +293,7 @@
     {
      "data": {
       "text/html": [
-       "Query job 2cb31c3a-ccbc-40fc-b548-ce8503fd2cc3 is DONE. 171.4 MB processed. <a target=\"_blank\" href=\"https://console.cloud.google.com/bigquery?project=bigframes-dev&j=bq:US:2cb31c3a-ccbc-40fc-b548-ce8503fd2cc3&page=queryresults\">Open Job</a>"
+       "Query job b4143f15-4bac-44a5-bb29-c5056f95b30b is DONE. 171.4 MB processed. <a target=\"_blank\" href=\"https://console.cloud.google.com/bigquery?project=bigframes-dev&j=bq:US:b4143f15-4bac-44a5-bb29-c5056f95b30b&page=queryresults\">Open Job</a>"
       ],
       "text/plain": [
        "<IPython.core.display.HTML object>"
@@ -312,7 +312,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "9d2e3ced089a4cadbec9eb06d3724237",
+       "model_id": "c70b5611db6b4e6a806a16d0a8287cd3",
        "version_major": 2,
        "version_minor": 1
       },
@@ -337,7 +337,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "venv",
    "language": "python",
    "name": "python3"
   },
@@ -351,7 +351,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.10.16"
+   "version": "3.10.15"
   }
  },
  "nbformat": 4,