There are a few posts on my site that get the lion’s share of traffic. One of those is a one-off project I did to convert Maildir to Mbox. Today someone left a comment, saying that it didn’t work. And then I realized that somewhere along the line sys.argv[-1] had been converted to sys.argv. Not really the same thing.
I’ve update the page, but it’s a little embarrassing to only realize 18 months (or more) after originally posting it that you’ve been giving out bum advice.
Eventually, I’ll be right.