text: from flask_wtf import FlaskForm
  from wtforms import StringField, TextField, SubmitField
  from wtforms.validators import DataRequired, Length
  
  
  class ContactForm(FlaskForm):
      """Contact form."""
      name = StringField(
          'Name',
          [DataRequired()]
      )
      email = StringField(
          'Email',
          [
              Email(message=('Not a valid email address.')),
              DataRequired()
          ]
      )
      body = TextField(
          'Message',
          [
              DataRequired(),
              Length(min=4,
              message=('Your message is too short.'))
          ]
      )
      recaptcha = RecaptchaField()
      submit = SubmitField('Submit')