Update app.py

app.py

@@ -2,3 +2,9 @@ from transformers import pipeline
 import streamlit as st
 
 unmasker = pipeline('fill-mask', model='distilbert-base-uncased')
+
+def main():
+  st.title('EN mask filling')
+  st.write('Please insert english sentence with [MASK] to let model fill a mask')
+  st.write('For example, I [MASK] dog for a walk')
+