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Python

Build a Social Network with Flask - Macro

I keep getting k****** @treehouse.com as the result of this code. What would be the problem?

{% macro hide_email(User) %}

{% set name, domain = User.email.split("@") %}
{{% for letter_count in range(name|length) %}
    {% if letter_count==0 %}
        {{name[0]}}
    {% else %} 
        {{"*"}}
    {% endif %}
{% endfor %}
{{"@"+domain}}

{% endmacro %}

[MOD: added ```jinja formatting -cf]

2 Answers

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,423 Points

In your posted code, there is an extra left brace on the 4th line. But that's not the main issue. The issue with jinja2 templates is the addition of extra white space around items. There are two options:

#1 flatten out the loop:

{% macro hide_email(User) %}

{% set name, domain = User.email.split("@") %}
{% for letter_count in range(name|length) %}{% if letter_count==0 %}{{name[0]}}{% else %} {{"*"}}{% endif %}{% endfor %}{{"@"+domain}}

{% endmacro %}

#2 add jinja2 template markup to prevent the extra whitespace

Jinja2 templates allow you to put a "-" character at either end of the template tag. This template will also pass:

{% macro hide_email(User) %}

{% set name, domain = User.email.split("@") %}
{% for letter_count in range(name|length) %}
    {%- if letter_count==0 -%}
        {{name[0]}}
    {%- else -%} 
        {{"*"}}
    {%- endif -%}
{% endfor -%}
{{ "@"+domain}}

{% endmacro %}

Thank you for your answer Chris!