code: def _ctc_find_lib():
      """
      Find the directory that contains libwarpctc.so
      """
      if config.ctc.root != "":
          for lib_dir in ["build", "lib", "lib64"]:
              lib_path = os.path.join(config.ctc.root, lib_dir)
              if os.path.isdir(lib_path) and os.path.exists(lib_path):
                  lib_found = os.path.exists(
                      os.path.join(lib_path, "libwarpctc.so")
                  )
                  if lib_found:
                      return lib_path
      return None
  
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 1 for calling a global function with example usage: _ctc_find_lib() and returns: None, lib_path