Fix app.py

app.py

@@ -228,7 +228,7 @@ def main():
     st.title("Table Structure Recognition Demo")
     st.write('\n')
 
-    cols = st.beta_columns((1, 1, 1))
+    cols = st.columns((1, 1, 1))
     cols[0].subheader("Input page")
     cols[1].subheader("Structure output")
     cols[2].subheader("HTML output")
@@ -256,7 +256,7 @@ def main():
             cells = extract_text_from_cells(filename, cells)
             html_code = cells_to_html(cells)
 
-            cols[2].html(html_code)
+            cols[2].markdown(html_code, unsafe_allow_html=True)
 
 
 if __name__ == '__main__':