I wouldn't call Go a systems programming language. Having a GC alone sort of removes it from that category.
That sounds logical, and I'm no expert on either Go or systems programming, but I've often heard of Go being referred to as a systems programming language, and on their own blog[0] they list it in third place at 37% as popular use of the language. Well after web development, admittedly, so apparently it is more a web development language than a systems programming language. I was clearly wrong on that part.
Python is mostly an application programming language. It competes with Java, Ruby, C# and those kind of languages. Python also has tons of excellent libraries for a wide variety of specific domain areas, like Machine Learning (perhaps most famously at the moment), but also many others.
If you want specifically web-focused, Javascript or Typescript are the obvious places to go. Nothing is more web-focused than those two.