class_docstr: A container for each tier.
class_docstr_tok: ["A","container","for","each","tier","."]
docstr: @return: Utterance time of a given tier.
  Screens out entries that begin with a non-speech marker.        
docstr_tok: ["@","return",":","Utterance","time","of","a","given","tier",".","Screens","out","entries","that","begin","with","a","non-speech","marker","."]
code: def time(self, non_speech_char="."):
      """
      @return: Utterance time of a given tier.
      Screens out entries that begin with a non-speech marker.
      """
  
      total = 0.0
      if self.classid != TEXTTIER:
          for time1, time2, utt in self.simple_transcript:
              utt = utt.strip()
              if utt and not utt[0] == ".":
                  total += float(time2) - float(time1)
      return total
  
imports: import sys
  import re
label_desc: Use image node_id 6 for calling the Tier obj's underlying member method code with example usage: obj.time(non_speech_char) and returns: total