Why output are different

Question

https://code.sololearn.com/cxfzVg4dKMb4/?ref=app

Answer 1

https://stackoverflow.com/questions/2347265
> For types that support both __iadd__ and __add__ you therefore have to be careful which one you use. a += b will call __iadd__ and mutate a, whereas a = a + b will create a new object and assign it to a. They are not the same operation!

Answer 2

list+=string
works as,
list = list + convertToList( string )

Answer 3

hamletmun
nice that you have found such exact answer.

Answer 4

I saw another post like this stand by...

Answer 5

Too late for me...

Answer 6

where exactly are you headed to space?