Update app.py

app.py

@@ -35,4 +35,9 @@ st.balloons()
 st.progress(10)
 with st.spinner('Wait for it...'):
     time.sleep(10)
-    
+
+
+import pandas as pd
+import numpy as np
+df= pd.DataFrame(np.random.randn(10, 2), columns=['x', 'y'])
+st.line_chart(df)