code: def activate(self, path=None, replace=False):
          
          if path is None:
              path = sys.path
          self.insert_on(path, replace=replace)
          if path is sys.path:
              fixup_namespace_packages(self.location)
              for pkg in self._get_metadata('namespace_packages.txt'):
                  if pkg in sys.modules:
                      declare_namespace(pkg)
docs: Ensure distribution is importable on `path` (default=sys.path)