text: from flask import Flask, request, render_template
  from jsonschema import ValidationError
  from lint.utils import Padl
  
  app = Flask(__name__)
  
  @app.route('/')
  def hello(msg=''):
      return render_template('hello.html', msg=msg, input_padl='', txt_colour='white')
  
  @app.route('/validate', methods=['POST'])
  def validate():
      #return request.form['yaml'] + "valid!"
      try:
          txt_colour = 'green'
          msg = 'Valid!'
          Padl(request.form['yaml']).validate()
      except ValidationError:
          txt_colour = 'red'
          msg = 'Not Valid'
      return render_template('hello.html', msg=msg, input_padl=request.form['yaml'], txt_colour=txt_colour)