Add example app on Snowflake

examples/snowflake/.gitignore

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+creds.json

examples/snowflake/app.py

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+import json
+
+import plotly.express as px
+import snowflake.snowpark.functions as F
+from shinywidgets import output_widget, render_widget
+from snowflake.snowpark.session import Session
+
+from shiny import App, Inputs, Outputs, Session, reactive, ui
+
+# create a snowpark session
+with open("creds.json") as f:
+    connection_parameters = json.load(f)
+session = Session.builder.configs(connection_parameters).create()
+print(f"Current Database and schema: {session.get_fully_qualified_current_schema()}")
+print(f"Current Warehouse: {session.get_current_warehouse()}")
+
+# Creating a Snowpark DataFrame
+catalog_sales = session.table("CATALOG_SALES")
+item = session.table("ITEM")
+
+
+sales_data = (
+    catalog_sales.join(item, on=F.col("CS_ITEM_SK") == F.col("I_ITEM_SK"), how="inner")[
+        "I_CATEGORY", "I_COLOR", "CS_EXT_SALES_PRICE"
+    ]
+    .limit(100000)
+    .to_pandas()
+)
+
+color_options = sales_data["I_COLOR"].unique().tolist()
+
+
+app_ui = ui.page_fluid(
+    ui.layout_sidebar(
+        ui.panel_sidebar(ui.input_select("color", "Color", color_options)),
+        ui.panel_main(output_widget("total_sales")),
+    )
+)
+
+
+def server(input: Inputs, output: Outputs, session: Session):
+    @reactive.Calc
+    def sub_sales_data():
+        index_category = sales_data["I_COLOR"].isin([input.color()])
+        sub_sales_data = sales_data[index_category]
+
+        return sub_sales_data
+
+    # total sales revenue plot
+    @output
+    @render_widget
+    def total_sales():
+        total_sales = px.bar(
+            sub_sales_data()
+            .groupby("I_CATEGORY")["CS_EXT_SALES_PRICE"]
+            .sum()
+            .reset_index()
+            .sort_values(by="CS_EXT_SALES_PRICE", ascending=True),
+            color="I_CATEGORY",
+            x="I_CATEGORY",
+            y="CS_EXT_SALES_PRICE",
+            title="Total Sales Revenue by Category",
+            labels={
+                "I_CATEGORY": "Product Category",
+                "CS_EXT_SALES_PRICE": "Total Sales Revenue($)",
+            },
+        )
+        return total_sales
+
+
+app = App(app_ui, server)