Update app.py

app.py

@@ -398,7 +398,12 @@ def itt(url):
             print(f'{url}.{i}.{d}.pdf')
             print(r.status_code)
             if r.status_code == 429:
-                time.sleep(30)
+                while True:
+                    r=requests.get(f'{url}.{i}.{d}.pdf')
+                    if r.status_code==429:
+                        time.sleep(61)
+                    else:
+                        break
             if r.status_code == 200:
                 out.append(f'{url}.{i}.{d}.pdf')
                 yield out