For dnslib [1] I use a much simpler fuzzer as part of the test suite [2] - this is nothing like as sophisticated as afl-fuzz or go-fuzz in terms of understanding and exercising code paths (just takes a DNS record and randomly mutates it - though still found a number of bugs).

Does anyone know if there is anything similar to afl-fuzz/go-fuzz for python?

[1] https://bitbucket.org/paulc/dnslib/ [2] https://bitbucket.org/paulc/dnslib/src/22cff0cd3e13098c00107...