app.py

import streamlit as st
import pandas as pd
import numpy as np


st.title('Simple Streamlit App')

st.write("Here's our first attempt at using data to create a table:")

data = pd.DataFrame({
   'first column': np.arange(1, 5),
   'second column': np.power(10, np.arange(1, 5))
})
st.write(data)

if st.button('Say hello'):
    st.write('Hello!')
else:
    st.write('Press the button above.')