Delete first item in each key in a dictionary
<p>I'm kind of stumped here and would love some help.</p>

<p>So I have a dictionary like so</p>

<pre><code>{'a':[1, 2, 3], 'b':[4, 5, 6]}
</code></pre>

<p>and I need to create a function which will automatically delete the first item in each list/key, so it should become</p>

<pre><code>{'a':[2, 3], 'b':[5, 6]}
</code></pre>

<p>I know I should use the pop function, but it kind of gets confusing when there's way more than 2 keys and 3 values</p>