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POPython dict: get values sorted by a list of keys
 

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  1. POPython dict: get values sorted by a list of keys
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    <p>I don't wan to use numpy to work with a 2D matrix</p> <p>I figured out how to create something that looks like a row and column dictionary. It works fine if I want to look up single values.</p> <p>But I'm having trouble figuring out how to get values from a row in the same order as I use my columns</p> <pre><code>from collections import defaultdict dic = defaultdict(dict) rowKeys = ['1','2','3'] columnKeys = ['alfa', 'omega', 'bravo', 'charlie'] # Filling up the dictionary with values from random import randrange for rKey in rowKeys: for cKey in columnKeys: dic[rKey][cKey] = randrange(50) """ print dic defaultdict(&lt;type 'dict'&gt;, { '1': {'omega': 28, 'charlie': 42, 'alfa': 13, 'bravo': 45}, '3': {'omega': 8, 'charlie': 5, 'alfa': 13, 'bravo': 4}, '2': {'omega': 19, 'charlie': 42, 'alfa': 29, 'bravo': 26}}) """ # print dic[rowKeys[0]].keys() # ['omega', 'charlie', 'alfa', 'bravo'] # In [28]: print dic[rowKeys[0]].values() # [28, 42, 13, 45] </code></pre> <p>I want a list of values in the "original" order</p> <pre><code>[13, 28, 45, 42] </code></pre> <p>Is there a clean easy-to-read way of doing this?</p> <hr> <h2>UPDATE</h2> <p>@jamylak came with an answer that solved my specific problem.</p> <p><strong>But</strong> it did not truly answer my question of how to get values by a list. Suppose I change the order of columnKeys alphabetically (or by other non-logic order) and want to get at list of values returned in that order. How would I go about that <em>_</em>_?</p>
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    1. COSurely the whole point in named columns is that order is no longer important?
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    2. COSounds like you might need a [`OrderedDefaultdict`](http://stackoverflow.com/a/4127426/355230).
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