code: def get_release_date ():
      
      fname = os.path.join("doc", "changelog.txt")
      release_date = "unknown"
      with open(fname) as fd:
          # the release date is on the first line
          line = fd.readline()
          mo = release_ro.search(line)
          if mo:
              release_date = mo.groups(1)
      return release_date
docs: Parse and return relase date as string from doc/changelog.txt.