title: Python: Input and output filename matching
body: <p>I'm trying to come up with a way for the filenames that I'm reading to have the same filename as what I'm writing. The code is currently reading the images and doing some processing. My output will be extracting the data from that process into a csv file. I want both the filenames to be the same. I've come across fname for matching, but that's for existing files. </p>