Update app.py

app.py

@@ -364,6 +364,7 @@ def count_days(date1,date2):
 
     
 def nasa_sdo_images(obj,size,date1,date2):
+    url_box=[]
     html_in=f"<style>{css}</style><div class='img_box_soho'>"
     print(date1 + " - " + date2)
     #if int(date2[6:8])-int(date1[6:8]) >0: