That's a great move right here! well done !!

its called aliasing..

number_to_string = str

its like instructing python that str has another name as well, namely 'number_to_string'.

Thanks for the detailed explanation of this approach.

Dayum thats a smart move

Thanks for the explanation!

outstanding move!

How does this work ?

thanks for explaining!

Can anyone explain this solution? thanks

you are right, in productive use this is absolutely vital

You shoudln't just pass on ever OSError, this could also be raised when you e.g. run out of inodes, so you would want to error there.

n being negative is the challenging part of the kata. I am choosing to leave it in.

Thank you for your suggestions. Shall incorporate them.

The instructions are extremely terse. The 'Sum of consequtive numbers' is strange to explain - you could perhaps mention this is a mathematical progression, or mention triangle numbers. When I first attempted the problem I thought 'n' was a list not a number! Mention the types you expect too.

Removing the case of negative numbers would be very good too - they are a bit of a nasty concept here. Leave them in only if you have to.

I would suggest this phrasing:

'sum_of_n' takes an integer 'n' and returns a list of length abs(n) + 1. The list contains the first numbers in the arithmatic series produced by taking the sum of the consequtive integer numbers from 0 to n inclusive.