code: def install_dependencies(dependencies, verbose=False):
      
      if not dependencies:
          return
  
      stdout = stderr = None if verbose else subprocess.DEVNULL
      with tempfile.TemporaryDirectory() as req_dir:
          req_file = Path(req_dir) / "requirements.txt"
  
          with open(req_file, "w") as f:
              for dependency in dependencies:
                  f.write(f"{dependency}\n")
  
          pip = ["python3", "-m", "pip", "install", "-r", req_file]
          # Unless we are in a virtualenv, we need --user
          if sys.base_prefix == sys.prefix and not hasattr(sys, "real_prefix"):
              pip.append("--user")
  
          try:
              subprocess.check_call(pip, stdout=stdout, stderr=stderr)
          except subprocess.CalledProcessError:
              raise Error(_("failed to install dependencies"))
  
          # Reload sys.path, to find recently installed packages
          importlib.reload(site)
docs: Install all packages in dependency list via pip.