Create app.py

app.py

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+import streamlit as st 
+import pandas as pd 
+import plotly.express as px 
+
+st.title("🎈 Streamlit Deployment Demo")
+
+df = pd.read_csv("https://raw.githubusercontent.com/mwaskom/seaborn-data/master/penguins.csv")
+
+col_name = st.selectbox("Column name", df.columns ) 
+
+st.write("you selected " + col_name)
+
+px_hist = px.histogram(df[[col_name]])
+
+st.plotly_chart(px_hist)
+
+st.dataframe(df)