iterating through dictionary with list as values in python
<p>Say you have a dictionary as shown:</p>

<p><code>d = { 'a': ['s','b'], 'b': ['x1','y1','z1'] }</code></p>

<p>How could i produce the following output:</p>

<p><code>s, x1, b, y1, z1</code></p>

<p>Thanks</p>
