code: def find_include_path():
      
      incl_from_env = os.environ.get('MXNET_INCLUDE_PATH')
      if incl_from_env:
          if os.path.isdir(incl_from_env):
              if not os.path.isabs(incl_from_env):
                  logging.warning("MXNET_INCLUDE_PATH should be an absolute path, instead of: %s",
                                  incl_from_env)
              else:
                  return incl_from_env
          else:
              logging.warning("MXNET_INCLUDE_PATH '%s' doesn't exist", incl_from_env)
  
      curr_path = os.path.dirname(os.path.abspath(os.path.expanduser(__file__)))
      # include path in pip package
      pip_incl_path = os.path.join(curr_path, 'include/')
      if os.path.isdir(pip_incl_path):
          return pip_incl_path
      else:
          # include path if build from source
          src_incl_path = os.path.join(curr_path, '../../include/')
          if os.path.isdir(src_incl_path):
              return src_incl_path
          else:
              raise RuntimeError('Cannot find the MXNet include path in either ' + pip_incl_path +
                                 ' or ' + src_incl_path + '\n')
docs: Find MXNet included header files.
  
      Returns
      -------
      incl_path : string
          Path to the header files.