Update app.py

app.py

@@ -22,7 +22,7 @@ def promptgen(choice, num, artist):
   artists_num = 0
   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:
+    if rand.startswith('art by') and artists_num < int(artist):
         artists_num +=1 
         generated.append(rand)
     elif not rand.startswith('art by'):