code: def ttCompile(input, output, options):
      input_name = input
      if input == "-":
          input, input_name = sys.stdin, sys.stdin.name
      output_name = output
      if output == "-":
          output, output_name = sys.stdout.buffer, sys.stdout.name
      log.info('Compiling "%s" to "%s"...' % (input_name, output))
      if options.useZopfli:
          from fontTools.ttLib import sfnt
  
          sfnt.USE_ZOPFLI = True
      ttf = TTFont(
          options.mergeFile,
          flavor=options.flavor,
          recalcBBoxes=options.recalcBBoxes,
          recalcTimestamp=options.recalcTimestamp,
      )
      ttf.importXML(input)
  
      if (
          options.recalcTimestamp is None
          and "head" in ttf
          and input is not sys.stdin
      ):
          # use TTX file modification time for head "modified" timestamp
          mtime = os.path.getmtime(input)
          ttf["head"].modified = timestampSinceEpoch(mtime)
  
      ttf.save(output)
  
imports: from fontTools.ttLib import TTFont, TTLibError
  from fontTools.misc.macCreatorType import getMacCreatorAndType
  from fontTools.unicode import setUnicodeData
  from fontTools.misc.textTools import Tag, tostr
  from fontTools.misc.timeTools import timestampSinceEpoch
  from fontTools.misc.loggingTools import Timer
  from fontTools.misc.cliTools import makeOutputFileName
  import os
  import sys
  import getopt
  import re
  import logging
label_desc: Use image node_id 3 for calling a global function with example usage: ttCompile(input, output, options) without return types