If the function called in map does not return anything, it will convert to a nothing, and call followup or elses

[cbefus]

reference https://github.com/cbefus/optional.py/blob/master/optional/something.py#L30

if we map an example function that returns nothing (None) then we will create a nothing from something and any attached or_else etc. will be called.

Example:

def do_stuff(stuff):
    print(stuff)

Optional.of("Hello").map(do_stuff).or_else_raise(Exception("BOOM"))

This will print "Hello" but will also raise the "BOOM" exception!

[dpassen]

This is hard to solve without a type system.

[dpassen]

I think we have to assume this is working as designed. You should be using if_present with the do_stuff method.

[cbefus]

Yes. non-issue - my bad.