code: def _brute_force_install_pip(self):
          
          if os.path.exists(self.pip_installer_fname):
              logger.debug("Using pip installer from %r", self.pip_installer_fname)
          else:
              logger.debug(
                  "Installer for pip not found in %r, downloading it", self.pip_installer_fname)
              self._download_pip_installer()
  
          logger.debug("Installing PIP manually in the virtualenv")
          python_exe = os.path.join(self.env_bin_path, "python")
          helpers.logged_exec([python_exe, self.pip_installer_fname, '-I'])
          self.pip_installed = True
docs: A brute force install of pip itself.