Convert list of list into single list : <p>Currently I have a list of lists</p>

<p><code>l=[['asd'],['fgd']].</code></p>

<p>I want to turn it into a list </p>

<p><code>goal_list=['asd','fgd']</code></p>

<p>but I do not know how to turn a list into the value inside it - does anyone have an idea how to this efficiently?</p>
