very witty

by "if index"

Very nicely worded code.

Yup. Forgot that % operator formatting detail myself that it accepts tuples.

Yeah, the specifications are not clear...

You are correct. I had this nested in a try/except clause beforehand to catch that error. I took it out when I noticed there wasn't any other 0.0 cases. Should probably put it back in :D

I'm not sure why an input preprocessing that loses precision and rounds numbers in not-so-straightforward ways would be added to any kata...
Anyway, what rule would you suggest that would map 0.06 to "0.06"? This coincides with float-to-int conversion in some languages. If you mean those, you'd need to write a full specification of this conversion in the description and users would need to reimplement that in other languages.

What is Decimal('0.06')? I should have said: 0.06 -> "0.06" -> Decimal("0.06") to be more explicit.

From type float to type Decimal? OK, the exact value of float(0.06) is Decimal('0.059999999999999997779553950749686919152736663818359375'), then what?

Transformed from float to decimal.

Transformed from what to what? I got an exact number with 53 significant binary digits. Rounded down, the number was less than decimal 0.06.

This worked, Thanks!

Try again, please. I just removed the 0 case which seems to be problematic.

Floating point numbers follow IEEE specifications in all or almost all languages, so it's the same everywhere.