class AnimalForm(FlaskForm):
    name = StringField('name', validators=[validators.Required(), validators.length(max=30)])
    kind = StringField('kind', validators=[validators.Required(), validators.length(max=10)])
    description = TextAreaField('description', validators=[])

      <form method="POST">
      <p>{{ form.name.label }}:{{ form.name(size=30) }}</p>
      <p>{{ form.kind.label }}:{{ form.kind(size=20) }}</p>
      <p>{{ form.description.label }}:{{ form.description(cols="50", rows="20") }}</p>
      <button type="submit">Submit</button>
      </form>

    form = AnimalForm()
    if form.validate_on_submit():
        name = form.name.data
        kind = form.kind.data
        description = form.description.data

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