code: def pep440_dev_version(self, verbose=False, non_local=False):
          
          # Always return a timestamp
          pep440 = '.dev{:%Y%m%d%H%M}'.format(datetime.now())
  
          if not non_local:
              build_number = os.environ.get('BUILD_NUMBER', 'n/a')
              if build_number.isdigit():
                  pep440 += '+ci.{}'.format(build_number)
                  if verbose:
                      notify.info("Adding CI build ID #{} to version".format(build_number))
  
          return pep440
docs: Return a PEP-440 dev version appendix to the main version number.