input: def generate_rest_api():
      """Generate a REST API with Python and Flask that allows users to create, read, update, and delete records from a database.
      
      Example:
      For the generated REST API, we should be able to:
      - Read all records: GET request to '/records' should return a list of all names.
      - Create a record: POST request to '/records' with JSON body {'name': 'John'} should create a new record and return its ID.
      - Update a record: PUT request to '/records/1' with JSON body {'name': 'John Doe'} should update the record with ID 1.
      - Delete a record: DELETE request to '/records/1' should delete the record with ID 1.
      """
      from flask import Flask, request
      from flask_sqlalchemy import SQLAlchemy
  
      app = Flask(name)
      app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:////tmp/test.db'
      db = SQLAlchemy(app)
  
      class Record(db.Model):
          id = db.Column(db.Integer, primary_key=True)
          name = db.Column(db.String(120), unique=True)
  
      db.create_all()
  
      @app.route('/records', methods=['GET'])
      def get_records():
          records = Record.query.all()
          return {'records':[record.name for record in records]}
  
      @app.route('/records', methods=['POST'])
      def create_record():
          record = Record(name=request.json['name'])
          db.session.add(record)
          db.session.commit()
          return {'id': record.id}
  
      @app.route('/records/<int:id>', methods=['PUT'])
      def update_record(id):
          record = Record.query.get(id)
          record.name = request.json['name']
          db.session.commit()
          return {'message': 'Record updated'}
  
      @app.route('/records/<int:id>', methods=['DELETE'])
      def delete_record(id):
          Record.query.filter_by(id=id).delete()
          db.session.commit()
          return {'message': 'Record deleted'}
  
      if name == 'main':
          app.run(debug=True)
output:     return app