Flask-Login documentation: LoginForm()

Question

Following the Flask Login manual , I am looking for the right library to include so that I can call the LoginForm() function.

Which library do I need to include that contains the LoginForm() part?

Answer 1

LoginForm is a class inherit from FlaskForm
First, you need install some modules: pip install flask flask-login flask-wtf
There is a module (such as form.py ) with content:

from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, SubmitField


class LoginForm(FlaskForm):
    username = StringField('Username')
    password = PasswordField('Password')
    submit = SubmitField('Submit')

This module contains form which be generated by flask_wtf module. And import LoginForm in your script.

from form import LoginForm

File login.html (in templates directory in current directory) will using flask-wtf to generate html code for LoginForm by using wtf.quick_form(form)
You can read example in this article to understand more detail or flask home page to understand structure of flask app