code: def _release(self):
          
  
          pypiconfig = pypi.PypiConfig()
  
          # Does the user normally want a real release?  We are
          # interested in getting a sane default answer here, so you can
          # override it in the exceptional case but just hit Enter in
          # the usual case.
          main_files = os.listdir(self.data['workingdir'])
          if 'setup.py' not in main_files and 'setup.cfg' not in main_files:
              # Neither setup.py nor setup.cfg, so this is no python
              # package, so at least a pypi release is not useful.
              # Expected case: this is a buildout directory.
              default_answer = False
          else:
              default_answer = pypiconfig.want_release()
  
          if not utils.ask("Check out the tag (for tweaks or pypi/distutils "
                           "server upload)", default=default_answer):
              return
  
          package = self.vcs.name
          version = self.data['new_version']
          logger.info("Doing a checkout...")
          self.vcs.checkout_from_tag(version)
          self.data['tagdir'] = os.path.realpath(os.getcwd())
          logger.info("Tag checkout placed in %s", self.data['tagdir'])
  
          # Possibly fix setup.cfg.
          if self.setup_cfg.has_bad_commands():
              logger.info("This is not advisable for a release.")
              if utils.ask("Fix %s (and commit to tag if possible)" %
                           self.setup_cfg.config_filename, default=True):
                  # Fix the setup.cfg in the current working directory
                  # so the current release works well.
                  self.setup_cfg.fix_config()
  
          sdist_options = self._sdist_options()
  
          if 'setup.py' in os.listdir(self.data['tagdir']):
              self._upload_distributions(package, sdist_options, pypiconfig)
  
          # Make sure we are in the expected directory again.
          os.chdir(self.vcs.workingdir)
docs: Upload the release, when desired