using a loop result as a variable for child loop

Question

I think the best way to describe is problem is with an example.

{% for content in contents %}
 {% for stuff in {{content}} %}
 {{stuff}}
 {% endfor %} 
{% endfor %}

I am using google app engine webapp templates. I can't seem to use a result from the parent forloop {{content}} as a variable for its child forloop. TemplateSyntaxError: Could not parse the remainder: '{{content}}' from '{{content}}' Is it possible to do this? Thanks!!

Answer 1

You can use only content without braces around:

{% for content in contents %}
 {% for stuff in content %}
 {{ stuff }}
 {% endfor %} 
{% endfor %}

When you are inside the first for-loop, content exists in the context, as any other variable. Same thing for stuff in the inner loop. Plus, blocks are generally using argument as variables, except in it is surrounded by quotes.
The {{ }} notation can be use to only display the variable in the document.

• mrmo123: Thanks Maxime. I'm been trying this code an it looks promising. One question though...say the first output for content in contents contains the word 'math' . Would this make the inner loop {% for stuff in math %} ? It doesn't seem to be working this way.
• Maxime Lorant: Yes. If contents = ['math', 'physics'] then content will be "math" at the first iteration (and so the inner loop will iterate over each character, Python string are iterable), and then "physics" at the second iteration.
• mrmo123: I think that's the problem I'm having actually, my output is m a t h. It's like the loop is doing one character at a time, is there a way to make it so it does the entire word at once?
• Maxime Lorant: As I said, if you have a list of words, one loop is enough to have the whole word each time ;)
• mrmo123: Also, I'm not sure if this is important, but content and math are in the same dictionary, but as different entries. In another words, the inner loop: {% for stuff in math %} gives me a different result than {% for stuff in content.name %}