Update app.py

app.py

@@ -96,24 +96,24 @@ def upd_drop(lvl_1=None,lvl_2=None,lvl_3=None,lvl_4=None,lvl_5=None,fetch_url=""
     else:
         lvl_src=out_json[lvl_1]
     print (f"lvl_src:: {lvl_src}")
-    if lvl_1 !="" and lvl_1 != None:
+    if lvl_1 !=[]:
         for ea in (lvl_src):
             box_1.append(ea)    
         out= gr.update(choices = [m for m in box_1])
-    if lvl_2 !="" and lvl_2 != None:
+    if lvl_2 !=[]:
         for ea in (lvl_src[lvl_2]):
             print (ea)
             box_2.append(ea)    
         out= gr.update(choices = [m for m in box_2])
     else:
         pass
-    if lvl_3 !="" and lvl_3 != None:
+    if lvl_3 !=[]:
         for ea in (lvl_src):
             box_3.append(ea[lvl_2][lvl_3])    
         out= gr.update(choices = [m for m in box_3])
     else:
         pass
-    if lvl_4 !="" and lvl_4 != None:
+    if lvl_4 !=[]:
         for ea in (lvl_src):
             box_4.append(ea[lvl_2][lvl_3][lvl_4])    
         out= gr.update(choices = [m for m in box_4])