code: def pip_version(self):
          
          from .vendor.packaging.version import parse as parse_version
          pip = next(iter(
              pkg for pkg in self.get_installed_packages() if pkg.key == "pip"
          ), None)
          if pip is not None:
              pip_version = parse_version(pip.version)
          return parse_version("18.0")
docs: Get the pip version in the environment.  Useful for knowing which args we can use
          when installing.