default character added

app.py

@@ -178,7 +178,7 @@ model.to(device)
 # generate from the model
 context = torch.zeros((1, 1), dtype=torch.long, device=device)
 
-def greet(start_character, number_of_tokens):
+def greet(start_character=" ", number_of_tokens):
     context[0][0] = encode(start_character)[0]
     max_new_tokens = number_of_tokens
     return decode(model.generate(context, max_new_tokens=int(max_new_tokens))[0].tolist())