Update app.py

app.py

@@ -4,6 +4,8 @@ from transformers import pipeline
 from gpt import model
 
 # Character mappings from the training script
+with open('input.txt', 'r', encoding='utf-8') as f:
+      text = f.read()
 chars = sorted(list(set(text)))
 vocab_size = len(chars)
 stoi = { ch:i for i,ch in enumerate(chars) }