[Python] My Python code takes a long time to run and nothing happens [closed]

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

read = pd.read_csv('titanic.csv')

fig = px.pie(read, names="Sex", values="Pclass")

app = Dash(__name__ , title = 'first dashboard')
app.layout = dcc.Graph(figure = fig)

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

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