totally overcoded this lol

testBasicMorseDecoding
Expected: is "SOS"
but: was "null"
Stack Trace
Completed in 11ms
testMoreComplexTests
Expected: is "E"
but: was "nullE"

it's so weird

THIS. This should be Best Practice. Otherwise it's just clever.

Yes, I don't think this is best practice. Clever, yes, but doesn't account for what you said

.

Fixed.

Why do we use set instead of using a list as a storage? Is it to lessen repeating numbers?

Thank you!

In Python there is not much of a difference.

However, for general understanding, in other programming languages quotes (') ar usually used for either Character or for non-intrepretable string (aka, string where you cannot introduce a variable).
So, it is good to have those in mind.

I generally use (') for char and (") for strings.
PEP: https://peps.python.org/pep-0008/#string-quotes

tnx, but i run it, right now i have another problem with next part )))

Test Results:
DecodeMorse
Example from description
Basic bits decoding
Expected
: E
to equal
: I
Completed in 0.5543ms
Multiple bits per dot handling
Expected
: U
to equal
: I
Completed in 0.4476ms
Extra zeros handling
Long messages handling
Expected
: S54S4HSLH
to equal
: THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG.
Completed in 0.4355ms

Well, you returned a string with some missing spaces ("THELAZYDOG", when expected ending is "THE LAZY DOG"). You should print the input to console and try to debug it. For more information, see https://docs.codewars.com/training/troubleshooting

Golang:
Expected
: SOS! THE QUICK BROWN FOX JUMPS OVER THELAZYDOG.
to equal
: SOS! THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG.
I dont understood why?

same

this is much better than mine DX