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POIs there a better way to iterate over tuples in a (Django) template in Google App Engine?
 

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  1. POIs there a better way to iterate over tuples in a (Django) template in Google App Engine?
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    <p>Basically, what I'm trying to do is to render <code>os.environ</code> in a template in <a href="http://en.wikipedia.org/wiki/YAML" rel="nofollow noreferrer">Google App Engine</a>. I believe the technology is (or is adapted from) the Django template engine version 0.96 (but correct me if I'm wrong).</p> <p>I found <a href="https://stackoverflow.com/questions/271077/django-how-to-do-tuple-unpacking-in-a-template-for-loop">this question</a> suggesting that you could do:</p> <pre><code>{{ for key, value in environ}} </code></pre> <p>But when I try that, I get an error saying:</p> <blockquote> <p>'for' statements with five words should end in 'reversed': for key, value in environ</p> </blockquote> <p>I guess that question was concerning another version of Django?</p> <p>By the way, the value of <code>environ</code> is set to <code>os.environ.items()</code> before rendering the template.</p> <p>Anyway, I came up a key_value_pair class that I could use instead:</p> <pre><code>class key_value_pair: def __init__(self, key, value): self.key = key self.value = value def make_kvp(key, iter): return key_value_pair(key, iter[key]) </code></pre> <p><code>make_kvp</code> is small "factory" method that I later use to set the <code>environ</code> template value like this:</p> <pre><code>map(lambda x : make_kvp(x, os.environ), os.environ) </code></pre> <p>When doing that everything works just fine, but since I'm a totally new to the technologies in play here, I just wanted to make sure that I'm not overseeing some obvious simpler solution.</p>
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