String splitting question

[Jim Shady]

Hello,

I am a beginner at Python and I just joined this group.

I have a string:

abcd/df/a/iiwk/abcdefghijkl/b/c

I need to get the longest string between the /s of the string. For
example, longest_str() for the above line should return
'abcdefghijkl'. How do I go about doing this?

Thanks in advance.

Regards,
Jim