code: def ctc_present():
      if ctc_present.avail is not None:
          return ctc_present.avail
      ctc_lib_path = _ctc_find_lib()
      ctc_present.path = ctc_lib_path
      ctc_present.avail, ctc_present.msg = _ctc_check_compile(
          ctc_present.path
      )
      return ctc_present.avail
  
imports: from __future__ import division, absolute_import, print_function
  import os
  import sys
  import theano.tensor
  from theano import config
  from theano import gof
  from theano.gof import local_optimizer
  from theano.gof.cmodule import GCC_compiler
  from theano.tensor.opt import register_canonicalize
  from theano.tensor.extra_ops import cpu_contiguous
  from theano.gradient import grad_undefined
label_desc: Use image node_id 3 for calling a global function with example usage: ctc_present() and returns: ctc_present, ctc_present