Update app.py

app.py

@@ -194,6 +194,7 @@ with col_1:
 with col_2:
     st.markdown("<br style='margin:15px 0'>", unsafe_allow_html=True)
     example = st.button("Example")
+    st.markdown('<style>div.row-widget.stButton > div{margin-left: auto;}</style>', unsafe_allow_html=True)
     
     # with col_2:
     #     st.markdown("### Examples")
@@ -215,15 +216,18 @@ if uploaded_file is not None:
     os.system(f'mkdir -p {uploaded_file.name.strip(".fits")}')
     fname = uploaded_file.name.strip(".fits")
     st.session_state['loaded'] = True
+    st.session_state['example'] = False
 
-if example:
+if uploaded_file is not None) and :
     fname = "NGC4649_example"
     data, wcs = load_file(f"{fname}.fits")
-    st.session_state['loaded'] = True
+    st.session_state['loaded'] = False
+    st.session_state['example'] = True
 
 if "data" not in locals():
     data = np.zeros((128,128))
     st.session_state['loaded'] = False
+    st.session_state['example'] = False
         
 # Make six columns for buttons
 _, col1, col2, col3, col4, col5, col6, _ = st.columns([bordersize,0.5,0.5,0.5,0.5,0.5,0.5,bordersize])
@@ -254,7 +258,7 @@ with col5: decompose = st.button('Decompose', key="decompose")
 # Make two columns for plots
 _, colA, colB, colC, _ = st.columns([bordersize,1,1,1,bordersize])
 
-if st.session_state['loaded']:
+if st.session_state['loaded'] or st.session_state['example']:
     # NORMALIZE IMAGE
     MIN = np.min(np.where(data == 0, 1, data))
     if MIN < 1: data = data / MIN