I need help with this macro in 'Build a Social Network with Flask', any ideas?

Question

This won't pass.  Another post suggested using the

{% hidden = (n[0] + ('*' * ((n|length)-1) + '@' + domain) %}

I also tried

{% hidden = (n[0] + ('*' * (len(n)-1) + '@' + domain) %}

but that didn't work either.
Please let me know if you know what the issue is, thanks.
```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) %}
{% name, domain = User.email.split('@')%}
{% n = [] %}
{% for l in name %}
{% n.append(l) %}
{% endfor %}
{% hidden = (n[0] + ('*' * ((n|length)-1) + '@' + domain) %}
{% print hidden %}
{% endmacro %}
```

Iain Simmons · Accepted Answer

So, in Flask/Jinja2 templates, you need to use the set command to set a variable within a template:
python
{% set name, domain = User.email.split('@')%}

And you 'print'/output expressions in the HTML using the double curly braces ( {{ }} ):
e.g.
python
{{ hidden }}

Note that you're adding in an additional loop and empty list that you don't need. You should be able to use the parts of the name variable that you need when you set hidden. In fact, you don't even really need to set hidden, you could just output the whole concatenated string within the double curly braces.
So I've realised now, while looking at your question and code, that despite what the code challenge description says, you don't actually need a for loop at all. Maybe something for @Kenneth Love (https://teamtreehouse.com/kennethlove) to look at?

Pete Jeffryes · Answer

Thanks, Iain. Appreciate the help.
Just in case anyone is using this code for their solution, there is also a missing closing parenthesis in setting hidden.

Welcome to the Treehouse Community

Looking to learn something new?

Pete Jeffryes

Pete Jeffryes

I need help with this macro in 'Build a Social Network with Flask', any ideas?

2 Answers

Iain Simmons

Iain Simmons

Kenneth Love

Kenneth Love

Iain Simmons

Iain Simmons

Kenneth Love

Kenneth Love

Pete Jeffryes

Pete Jeffryes