Technically, it depends on the size of the model you are using… But there’s a reason people use C++ in production: python just isn’t fast enough for that kind of traffic.
I’ve done a classification demo website in the past, python/pytorch-only, with Flask or Bottle or something like that, and requests took a couple of seconds to be processed (it was a ResNet-34 model, with input size close to ImageNet’s, run on a 1080Ti).
I’d recommend going by iteration: starting with python-only code, then switch to C++ if it’s too slow. Don’t know about GoLang, though!