app.py

import gradio as gr
import json

from transformers import pipeline
classifier = pipeline("zero-shot-classification", model="facebook/bart-large-mnli")

def tagging(
    text_input: str,
    tags: str,
    multi_label: bool
):
  try:
      candidate_labels = json.loads(tags)
      
  except error:
     raise gr.Error(f"Error {error}")

  classifier(text_input, candidate_labels, multi_label)
    
  return text
    
app = gr.Interface(fn=tagging, inputs=[
    gr.Textbox(label="Your input here"),
    gr.Textbox(label="Your input here"),
    gr.Checkbox(label="multi_label", value=True)
], outputs="text")

app.launch()