That bit about the scale not knowing if your flour settled in the bag is the whole thing. Grams are a starting point, not the boss of you.

Tighten that stop with a lock washer, never had mine drift after that.

Wait, so you were looking for a missing semicolon in Python? That doesn't really work that way since Python doesn't use semicolons at all except for putting multiple statements on one line. You probably meant a missing colon, right? That one gets me all the time too though. Forgetting a colon after a for loop or a function definition can make the whole thing crash and you'll just stare at it forever. Its like your brain sees what it expects to see instead of what's actually there. I've spent a good hour hunting for a colon that was right there the whole time but I just kept glossing over it. Slow and steady is the only way with syntax stuff.