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3804700
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2010-09-27T14:18:04.443
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2010-09-27T14:25:09.243
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2010-09-27T14:25:09.243
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3804666
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You'll need to use: <pre><code>StellarObjectAdmin.list_display.insert(1, 'size') </code></pre> Also, you'll need to change <code>list_display</code> from a <code>tuple</code> (which is <a href="http://en.wikipedia.org/wiki/Immutable_object" rel="nofollow">immutable</a>) to a <code>list</code>. Eg: <code>list_display = [ ... ]</code>. Finally, you'll probably be surprised by what happens: by inserting the item, you're going to be changing the list on <code>StellarObjectAdmin</code>. What you probably want to do is: <pre><code>list_display = list(StellarObjectAdmin.list_display) # copy the list list_display.insert(1, 'size') </code></pre> Which will create a new copy of the list for your <code>PlanetAdmin</code> class. This happens because of the way Python does inheritance. Basically, Python never injects names into a namespace (eg, some languages inject a magic <code>this</code> "variable" into methods, while Python forces you to explicitly define the equivalent — <code>self</code> — as the first argument of methods), and since a <code>class</code> is just another namespace, nothing (like, eg, values in its super classes) gets injected into it. When you've got a class, <code>B</code>, which inherits from another class, <code>A</code>, and you try to look up a property on <code>B</code> — <code>B.foo</code> — it first checks to see if <code>foo</code> is in <code>B</code>'s namespace, and if it isn't, it goes on to check <code>A</code>'s namespace, and so on. I hope that's clear… If not, I can clarify (or try to find relevant documentation).
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1. POInserting additional items into an inherited list in Django/Python
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