How to filter out columns that are all 0s in Python?
<p>I have some structures that needs to be filtered. Is there a way to do this nicely in Python? </p>

<p>I have an ugly way of doing this, but I want to clean it up:</p>

<pre><code>original_header = ['a','b','c']
original_rows = [[1,0,1], [0,0,0], [1,0,0]]

processed_header, processed_rows = some_cool_utility(original_header, original_rows)

assert_equals(['a', 'c'], processed_header)
assert_equals([[1,1], [0,0], [1,0]], processed_rows)
</code></pre>
