Well that means your code is incorrect, which is not a kata issue. (also there's almost 3k python completions)

X should equal Y

Well that information alone doesn't really help, it just means you return wrong result. You should specify the input that causes this assertion message. For example the first one you return '108devi', but it should be '108dvei'. (again without seeing the input it's too difficult to tell what's going on)

You should read this FAQ for general troubleshooting.

Feel free to reply if you still can't figure it out.

108devi should equal 108dvei

115ekop should equal 115eokp etc.

Please check your code and assertion message carefully before raising issue.

'65 119esi 111dl 111lw 108devi 105n 97n 111ka' should equal '65 119esi 111dl 111lw 108dvei 105n 97n 111ka'
'84eh 109ero 104e 115wa 116eh 108sse 104e 115ekop' should equal '84eh 109ero 104e 115wa 116eh 108sse 104e 115eokp'
'84eh 108sse 104e 115ekop 116eh 109ero 104e 104drae' should equal '84eh 108sse 104e 115eokp 116eh 109ero 104e 104dare'

not really an error, but it doesn't approve my code

but it shows error

What error??