One issue I'd like to point is I wish the author used proper random generated private key. Examples on the internet have a nasty habits of being copy pasted and reused verbatim :(
I think in python the right way is to use the os.urandom() function.
I don't think there's any harm in people copying and pasting examples, it only becomes an issue if they start depositing money to either of the addresses that I listed the private keys for. I hope that's an obvious enough mistake not to make! Thanks for the feedback anyway, I'll keep an eye on those addresses and if they start getting mysterious deposits change the article to include more cryptographically secure keys.