input: from flask import Flask, request
  import json
  
  app = Flask(__name__)
  items = ["Apple", "Banana", "Orange"]
  
  @app.route('/items', methods=["GET"])
  def get_items():
      return json.dumps(items)
  
  @app.route('/items/<item>', methods=["DELETE"])
  def delete_item(item):
      if item in items:
          items.remove(item)
          message = "Item successfully deleted."
      else:
          message = "Item not found."
      return json.dumps({"message": message})
  
  """
  This function creates a REST API in Python using Flask to delete an item from a list.
  >>> app.test_client().delete('/items/Banana').get_json()
  {'message': 'Item successfully deleted.'}
  >>> app.test_client().delete('/items/Grapes').get_json()
  {'message': 'Item not found.'}
  """
output:     
      if item in items:
          items.remove(item)
          message = "Item successfully deleted."
      else:
          message = "Item not found."
      return json.dumps({"message": message})
  