You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: six.rb
    path of file: ./repos/homebrew-core/Formula/s
    
    the code of the file until where you have to start completion: class Six < Formula
  desc "Python 2 and 3 compatibility utilities"
  homepage "https://github.com/benjaminp/six"
  url "https://files.pythonhosted.org/packages/7
    
  def caveats
    python_versions = pythons.map { |p| p.version.major_minor }
                             .map(&:to_s)
                             .join(", ")

    <<~EOS
      This formula provides the `six` module for Python #{python_versions}.
      If you need `six` for a different version of Python, use pip.
    EOS
  end