def get_installed_pypackages():
    return {p.project_name.lower(): p for p in pkg_resources.working_set}
def main(self):
      UI.OpenDialog(
        VBox(
          Heading("This Is a Heading."),
          Label("This is a Label."),
          PushButton("&OK")
        )
      )
      UI.UserInput()
      UI.CloseDialog()