code: def check_release_number(release):
      
      try:
          release = int(release)
      except:
          raise ValueError("Invalid Ensembl release: %s" % release)
  
      if release < MIN_ENSEMBL_RELEASE or release > MAX_ENSEMBL_RELEASE:
          raise ValueError(
              "Invalid Ensembl releases %d, must be between %d and %d" % (
                  release, MIN_ENSEMBL_RELEASE, MAX_ENSEMBL_RELEASE))
      return release
docs: Check to make sure a release is in the valid range of
      Ensembl releases.