Hmm: 17/26

Failures were:

• didn't know about the = option, but once I saw it once, I guessed right a few times
• never used ^ in Python, and didn't make the connection to XOR (I figured I'd need the math library or something)
• the r and a with =! (again, never used = option)
• edge cases in walrus operator and other things unrelated to f-strings

Most of those I missed (and many I got) I'd reject a PR over because it's not obvious enough what's going on. But I think given that, I did reasonably well.

But I learned something. Thanks for the post!