Update app.py

app.py

@@ -20,7 +20,7 @@ def promptgen(choice, num, artist):
   vocab = len(prompt)
   generated = []
   artists_num = 0
-  while len(sorted(set(generated), key=lambda d: generated.index(d))) < num:
+  while len(sorted(set(generated), key=lambda d: generated.index(d))) < int(num):
     rand = random.choice(prompt)
     if rand.startswith('art by') and artists_num < artist:
         artists_num +=1