Not as comprehensive as Python.

However, you can write scripts which pull in packages from the internet called "single-file packages": https://dub.pm/advanced_usage

Just tried it myself for the first time:

    #!/usr/bin/env dub
    /+ dub.sdl:
    name "hello"
    dependency "requests" version="1.1.5"
    +/
    import std.stdio : writeln;
    import requests : postContent;

    void main() {
      auto content = postContent("http://httpbin.org/post",
          ["name": "any name", "age": "42"]);
      writeln(content);
    }

On Linux, put this into a file, chmod +x it, and execute. The first time it will take a while (downloading and compiling packages). After that on my crappy laptop it takes:

    0.66user 0.06system 0:01.25elapsed 57%CPU
    

That is a lot more convenient than venv in Python.