fix output bug

app.py

@@ -1,6 +1,6 @@
 import gradio as gr
 
-def tokenize(python_code: str):
+def tokenize(buffer: str):
     split = {'(', ')', '{', '}', '[', ']', ',', ':', '+', '-', '*', '/', '%', '=', '\n'}
     DFA_table = {
         -1: {'any': -1},
@@ -27,7 +27,6 @@ def tokenize(python_code: str):
     finals = (17, 18)
     tokens = []
     cursor = 0
-    python_code=buffer
     while cursor < len(buffer):
         state = 0
         temp = ''