Problem about yield, please help!!

[cls0724]

Thanks for your help!
While i am trying my very best to understand the logic behind...but my question remains there.

Perhaps let me try to elaborate my concern in a more detailed way.

My understanding of the code is that the below recursion will keep going until i reach the 'flat' layer, i.e. 1

for sublist in nested:
            for element in flatten(sublist):

At this point, the 'flat' layer cannot be used in for again because it is an integer. So a TypeError takes places.

In order to capture it, we have the below code

except TypeError:
        yield nested

In this case, yield nested will return 1.

Then i dun understand what happens next. As you suggested, i thought the code freezes right there and gives us 1. I have to use next() to return the next 'flat' layer.

Nonetheless, it seems to me that it is the

yield element

that gives us 1 instead of

yield nested

.

Sorry for bothering you!