Remove and replace first space character from a field in an attribute table

Question

How can I remove and replace the first space characters from a field (a person's name)  in an attribute table?  Adn replace it with a comma.

FROM: Doe M Jane TO: Doe, M Jane.

I have been switching the names to Jane Doe by the following Python:

" ".join( !PRIMARY_OWNER! .split(", ").__reversed__())

This works perfectly but quite a few names do not include a comma.

Thanks.

RandyBurton · Accepted Answer

Some things to try (assuming there is no space in the last name - that is not a name like Van Gogh): >>> name = 'Doe M Jane' >>> ', '.join(name.split(" ", 1)) 'Doe, M Jane' >>> " ".join(name.split(" ", 1).__reversed__()).replace(',','') 'M Jane Doe' >>> name = 'Doe, M Jane' >>> if ',' not in name: ', '.join(name.split(" ", 1)) >>> name 'Doe, M Jane' >>> name = 'Doe M Jane' >>> if ',' not in name: ', '.join(name.split(" ", 1)) 'Doe, M Jane' ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍