Python: split a list based on a condition?
<p>What's the best way, both aesthetically and from a performance perspective, to split a list of items into multiple lists based on a conditional? The equivalent of:</p>

<pre><code>good = [x for x in mylist if x in goodvals]
bad  = [x for x in mylist if x not in goodvals]
</code></pre>

<p>is there a more elegant way to do this?</p>

<p>Update: here's the actual use case, to better explain what I'm trying to do:</p>

<pre><code># files looks like: [ ('file1.jpg', 33L, '.jpg'), ('file2.avi', 999L, '.avi'), ... ]
IMAGE_TYPES = ('.jpg','.jpeg','.gif','.bmp','.png')
images = [f for f in files if f[2].lower() in IMAGE_TYPES]
anims  = [f for f in files if f[2].lower() not in IMAGE_TYPES]
</code></pre>
