Update app.py

app.py

@@ -34,10 +34,10 @@ def predict(access_key, token, image, instructions, pre_input, input, seed = 42)
  print(">>> MODEL FAILED: Input: " + input + ", Attempted Key: " + access_key)
  return ("[UNAUTHORIZED ACCESS]", input, []);
 
- if len(instructions.strip()) <= 0:
+ if not instructions or len(instructions.strip()) <= 0:
  instructions = default_instructions
 
- if len(pre_input.strip()) <= 0:
+ if not pre_input or len(pre_input.strip()) <= 0:
  pre_input = default_pre_text
  
  formatted_input = instructions.replace(symbol, pre_input) + pre_input + input + "![](https://statical-stc-itt.hf.space/file=" + image + ")<end_of_utterance>\nAssistant:"