i added the @staticmethod decorator to make things clearer

You definetely can return a lambda function. Moreover, you can return lambda function from another lambda function.

can someone explain to me as to why you cant return a lambda function and give me some examples

why use lambda? is this faster or better or what?

Use spoiler flag next time.

why do you multiplicate "1.0"?

When using Python class and declaring methods with class scope, you need add @classmethod above the method declaration and add 'cls' to the beginning of method signature. Also remember to put the class name before all the class variables that used inside the given method

@classmethod

def from_roman(cls, roman)

i have the very same problem as mdczaplicki and i don't get your answer, csc4pg. can you write down, how the definition of functions should look like? i mean, instead of

def to_roman(self, n):
def from_roman(self, s):

is what exactly supposed to be on that lines? and don't tell me that would be spoiler, it's a manner of understanding the quest, you tell me no algorithm by that...

My favorite one

Think about what you are returning, in this case it's an integer, and the tests are trying to call a function

Because you have 'self' as one of the arguments to your methods, it requires an instance of the class to run.
Additionally, because codewars uses an old version of python, to run static methods, you need to have @staticmethod above your static method definitions

TypeError: unbound method to_roman() must be called with RomanNumerals instance as first argument (got int instance instead)
why is that?
I've got:
def to_roman(self, n):
def from_roman(self, s):

no init(self):

what am i doing wrong?

Oh, and I thought I was the only one to think it that way :)!

I did it with a 2 dimensional array, but the rest is quite similar :)