code: def gettime_s(text):
      
      pattern = r'([+-]?\d+\.?\d*) ?([munsecinh]+)'
      matches = re.findall(pattern, text)
      if len(matches) == 0:
          return None
      time = 0.
      for res in matches:
          tmp = float(res[0])
          if res[1] == 'ns':
              tmp *= 1e-9
          elif res[1] == 'us':
              tmp *= 1e-6
          elif res[1] == 'ms':
              tmp *= 1e-3
          elif res[1] == 'min':
              tmp *= 60
          elif res[1] == 'h':
              tmp *= 3600
          time += tmp
      return time
docs: Parse text and return a time in seconds.
  
      The text is of the format 0h : 0.min:0.0s:0 ms:0us:0 ns.
      Spaces are not taken into account and any of the specifiers can be ignored.