code: def yield_demo():
      def spell(x):
          for i in range(len(x)):
              time.sleep(0.5)
              yield x[:i]
  
      return gr.Interface(spell, "textbox", "textbox")
  
imports: import inspect
  import random
  import time
  import gradio
  import pytest
  from pydub import AudioSegment
label_desc: Use image node_id 6 for calling a global function with example usage: yield_demo() and returns: gr