Update app file

app.py

@@ -25,40 +25,39 @@ with col1:
     with st.expander('How to use it'):
         st.markdown(
         '''
-        1) Upload your P&ID or select example diagrams 📬
+        1) Upload your P&ID or select example diagrams  📬
         2) Set confidence threshold 📈
-        3) Press to perform inference 🚀
-        4) Visualize model predictions 🔎
+        3) Press to perform inference   🚀
+        4) Visualize model predictions  🔎
         '''
         )   
 
 st.write('##')
-
-with st.container(border = True):    
-    col1, col2, col3, col4 = st.columns([1, 2, 2, 1], gap='large')
-    with col2:
-        st.markdown('##### Input File')
-        # set input image by upload
-        image_file = st.file_uploader("Upload your diagram", type=["pdf"])
-        # set input images from examples
-        def radio_func(option):
-            option_to_id = {
-                'factory_pid.png' : 'A',
-                'plant_pid.png' : 'B',
-                'processing_pid.png' : 'C',
-            }
-            return option_to_id[option]
-        radio = st.radio(
-            'Or select from example diagrams',
-            options = ['factory_pid.png', 'plant_pid.png', 'processing_pid.png'],
-            format_func = radio_func,
-        )
-    with col3:
-        st.markdown('##### Preview')
-        # visualize input image
-        if image_file is not None:
-            image = Image.open(image_file)
-        else:
-            image = sahi.utils.cv.read_image_as_pil(IMAGE_TO_URL[radio])
-        with st.container(border = True):
-            st.image(image, use_column_width = True)
+   
+col1, col2, col3, col4 = st.columns([1, 2, 2, 1], gap='large')
+with col2:
+    st.markdown('##### Input File')
+    # set input image by upload
+    image_file = st.file_uploader("Upload your diagram", type=["pdf"])
+    # set input images from examples
+    def radio_func(option):
+        option_to_id = {
+            'factory_pid.png' : 'A',
+            'plant_pid.png' : 'B',
+            'processing_pid.png' : 'C',
+        }
+        return option_to_id[option]
+    radio = st.radio(
+        'Or select from the following examples',
+        options = ['factory_pid.png', 'plant_pid.png', 'processing_pid.png'],
+        format_func = radio_func,
+    )
+with col3:
+    st.markdown('##### Preview')
+    # visualize input image
+    if image_file is not None:
+        image = Image.open(image_file)
+    else:
+        image = sahi.utils.cv.read_image_as_pil(IMAGE_TO_URL[radio])
+    with st.container(border = True):
+        st.image(image, use_column_width = True)