alternately appending elements from two lists
<p>I have three lists with elements :</p>

<pre><code>a = [[0,1],[2,3],...]
b = [[5,6],[7,8],...]

c = []
</code></pre>

<p>I want to append elements from <code>a</code> and <code>b</code> into <code>c</code> to get:</p>

<pre><code>c = [ [0,1],[5,6],[2,3],[7,8],.... ]
</code></pre>

<p>You could <code>zip</code> the two lists and then reduce them to a flat list:</p>

<pre><code>import operator
c = reduce(operator.concat, zip(a, b))
</code></pre>

python list append