Create app.py

app.py

@@ -0,0 +1,32 @@
+import streamlit as st
+import numpy as np
+import pandas as pd
+import altair as alt
+
+st.write('Hello World')
+
+st.header('button')
+
+if st.button('Say Hello'):
+    st.write('Why hello there')
+else:
+    st.write('Goodbye')
+
+
+st.header('st.write')
+
+st.write('Hello World')
+st.write(1234)
+
+df = pd.DataFrame({'first column':[1, 2, 3, 4], 'second column': [10, 20, 30, 40]})
+st.write(df)
+
+df2 =  pd.DataFrame(
+     np.random.randn(200, 3),
+     columns=['a', 'b', 'c'])
+st.write(df2.head(5))
+c = alt.Chart(df2).mark_circle().encode(
+     x='a', y='b', size='c', color='c', tooltip=['a', 'b', 'c'])
+st.write(c)
+
+st.latex(r'N_t = \frac{1}{10}')