what about now?

Fixed.

oops. Issue of mine... But that also means a fixed test about that is missing.

XD

Sorry, I never got a notification for your last message (you're lucky I got here by a misclick... XD )

• Looks good, yeah. isfunction should be ismethod, tho, I guess.
• frenglish because my english is generally strongly coloured by my mother tongue (french) ;)

(if you wanna play with stuff like that, you could also try to see how to decorate every single method of the class by decorating the class itself, hence decorating each class one single time... ;o )

def logger(method): 
    def wrapper(self, *a, **kw):
        call   = method.__name__ if method.__name__!='__init__' else self.__class__.__name__
        args   = ''.join( f', {v!r}' for v in a)
        kwargs = ''.join( f', {k}={v!r}' for k,v in kw.items() )
        print(f"{call}(self{args}{kwargs})")
        return method(self, *a, **kw)
    return wrapper

Hi,

Just the same way, you can put logs everywhere at the start of all your methods (in python, it's a good occasion to use a decorator ;) ). Don't forget the constructor, to see when a new molecule is created.

Also, if you're using python and you're trying to debug specifically the random tests, you can declare TRACE_CALLS=True in your solution. But 'will work only for the random tests.

Sorry, this is my mistake, I did not expect that someone would decide in this way. Already corrected. thx

https://papersplease.fandom.com/wiki/Issuing_city

Funnel. Gravity well. Square based pyramid contour lines. Journey to the centre of the square earth, that is flat, and stands on the back of 4 elephants atop a star turtle :)

This means that the diagonals are in that order, but does not affect the order of the items in each of the diagonals, although that does seem a bit ambiguous, so I'll probably remove that.

onion layers

I couldn't think of a good name (and I did put 'spiral' in quotes :-)). When you make n a little larger it sort of spirals into the middle, maybe.