Hard programming question…

So I have a hard programming question, if anyone can answer this, I will hire you as a coder for my new website!
Question:
What does this piece of code do?
img_src.extend(['/%s' % f for f in glob.glob('static/tmp/'+`pin_id`+'.*.png')])

Anyone can answer this?! Please PM me the answer or write it here =)
-Ormus

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