test.py

import dash
from dash import html, dcc
import plotly.express as px
import pandas as pd

# Sample data for demonstration
df = pd.DataFrame({
    "Category": ["A", "B", "C", "D"],
    "Value": [10, 20, 15, 30]
})

fig = px.bar(df, x="Category", y="Value", title="Sample Bar Chart")

app = dash.Dash(__name__)

app.layout = html.Div([
    html.H1("Sample Dashboard"),
    dcc.Graph(figure=fig),
    html.Div([
        html.Label("Select a category:"),
        dcc.Dropdown(
            options=[{"label": cat, "value": cat} for cat in df["Category"]],
            value="A",
            id="category-dropdown"
        )
    ])
])

if __name__ == "__main__":
    app.run_server(debug=True)