On Ubuntu 14.04
python -c 'import crypt; print crypt.crypt("test", "$6$random_salt")'
$6$random_salt$BnOQxEG8Gk2rzFYwoWXjr59zLVYzwshvca5oV0PtU8fAfT4a571evgca.E0hLnYNCdfq//zw9YyQN33QtztI10
On OSX El Capitan
python -c 'import crypt; print crypt.crypt("test", "$6$random_salt")' ⏎ ✹ ✭
$6asQOJRqB1i2
What gives?