How do I use WTForms in my Flask application?

How do I use WTForms in my Flask application?

To use WTForms in your Flask app, first install the package using pip. Then, create a form class by inheriting from FlaskForm.

Can you show me a simple example of a form?

Sure! Here's a basic example:

from flask_wtf import FlaskForm
from wtforms import StringField, SubmitField

class MyForm(FlaskForm):
    name = StringField('Name')
    submit = SubmitField('Submit')

How do I render this form in a template?

You can render the form in your template using Jinja2 syntax:

<form method="POST">
    {{ form.hidden_tag() }}
    {{ form.name.label }}
    {{ form.name(size=32) }}
    {{ form.submit() }}
</form>

What about form validation?

WTForms provides built-in validators. You can add them to your fields like this:

from wtforms.validators import DataRequired

class MyForm(FlaskForm):
    name = StringField('Name', validators=[DataRequired()])