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Python

I honestly have no idea.

I've tried a bunch of different methods, but none of them work.

lunch.py
from flask import Flask, render_template

app = Flask(__name__)

@app.route('/')
def index():
    class User:
        email = None
    user = User()
    user.email = 'kenneth@teamtreehouse.com'
    return render_template('user.html', user=user)
templates/macro.html
{% macro hide_email(user) %}
    <h1>{{  {% for letter in user.email.split('@')[0] %}
                    letter
                {% endfor %}
    + '@'
    + user.email.split('@')[1]}}</h1>
{% endmacro %}