Python was never the right answer for the cases Go solves (OCaml was a better choice 5-10 years ago, and nowadays there are plenty of options). But it's still the best language around for where you just need to write a one-off script as quickly as possible (in that sense it's always been the new perl).
For a one-off script I still prefer Perl. But where I run into Python more is scientific computing. It seems to be making inroads into areas that previously would've only used Matlab. Haven't seen any Go in that area yet. Of the new entrants, Julia seems to be building buzz.
