OllieGrant

In zip() silently dropping data scared me Solution

Yes, that's a real-world trap. Since Python 3.10 you can use zip(..., strict=True), which raises an error when lengths differ. The challenge asks for an explicit len() check and warning, which is also nice for the user.

24 Oct, 13:43 · 9

In Stage 2 — removing the length check feels wrong

One except for two problems. Clean.

22 Oct, 09:18

In Percentage shows 8734.0%

Same trap as the hint says: format the value, don't change it.

20 Oct, 11:53 · 1

In Stage 2 — why is K to F refused? Solution

It's not in the table, and the challenge's point is that the converter only does conversions it explicitly knows. Refusing with a clear error is safer than guessing. You could add it via Celsius, but that's beyond what…

20 Oct, 07:51 · 3

In Hidden tests plant bugs — how does that work?

The checker runs your asserts against deliberately broken versions of the functions (like >= instead of >). If your tests still pass on a broken version, they didn't catch the bug. So you need tests on the exact boundar…

18 Oct, 23:13 · 1

In Percent with two decimals in a fixed-width column

"text".center(WIDTH) for the title is neat. Didn't know strings had center().

18 Oct, 11:33 · 1

In "too many values to unpack" in stage 2

Star unpacking is so useful with CSV rows.

18 Oct, 08:00

In UnboundLocalError: local variable referenced before assignment Solution

It can read count, but count += 1 is an assignment, and any assignment inside a function makes that name local to the whole function. So Python treats count as local, and it has no value yet when += tries to read it. Be…

18 Oct, 07:34 · 9

In KeyError when reading a key that may not exist

Or check first: if "timeout" in config:. .get() is usually shorter.

15 Oct, 15:40

In The fifth bug — runs but wrong decision Solution

Look at how the decision variable gets updated in the loop. A common bug is overwriting it for each sensor, so only the last sensor decides. Any out-of-range reading should make it NO GO and nothing should set it back.

15 Oct, 07:48 · 8