Update app.py

app.py

@@ -15,6 +15,8 @@ with st.form("my_form"):
    if submitted:
        st.write("slider", slider_val, "checkbox", checkbox_val)
 
+uploaded_file = st.file_uploader("Upload file")
+
 col1, col2, col3 = st.columns(3)
 
 with col1: