code: def preprocess_input_exprs_arg_string(input_exprs_str, safe=True):
      """Parses input arg into dictionary that maps input key to python expression.
  
      Parses input string in the format of 'input_key=<python expression>' into a
      dictionary that maps each input_key to its python expression.
  
      Args:
        input_exprs_str: A string that specifies python expression for input keys.
          Each input is separated by semicolon. For each input key:
            'input_key=<python expression>'
        safe: Whether to evaluate the python expression as literals or allow
          arbitrary calls (e.g. numpy usage).
  
      Returns:
        A dictionary that maps input keys to their values.
  
      Raises:
        RuntimeError: An error when the given input string is in a bad format.
      """
      input_dict = {}
  
      for input_raw in filter(bool, input_exprs_str.split(";")):
          if "=" not in input_exprs_str:
              raise RuntimeError(
                  '--input_exprs "%s" format is incorrect. Please follow'
                  '"<input_key>=<python expression>"' % input_exprs_str
              )
          input_key, expr = input_raw.split("=", 1)
          if safe:
              try:
                  input_dict[input_key] = ast.literal_eval(expr)
              except Exception as exc:
                  raise RuntimeError(
                      f'Expression "{expr}" is not a valid python literal.'
                  ) from exc
          else:
              # ast.literal_eval does not work with numpy expressions
              input_dict[input_key] = eval(
                  expr
              )  # pylint: disable=eval-used
      return input_dict
  
imports: import argparse
  import platform
  import ast
  import os
  import re
  from absl import app
  from absl import flags
  from absl.flags import argparse_flags
  import numpy
  from tensorflow.core.example import example_pb2
  from tensorflow.core.framework import types_pb2
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.client import session
  from tensorflow.python.debug.wrappers import local_cli_wrapper
  from tensorflow.python.eager import def_function
  from tensorflow.python.eager import function
  from tensorflow.python.framework import meta_graph
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.lib.io import file_io
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.saved_model import load
  from tensorflow.python.saved_model import loader
  from tensorflow.python.saved_model import save
  from tensorflow.python.saved_model import signature_constants
  from tensorflow.python.tools import saved_model_aot_compile
  from tensorflow.python.tools import saved_model_utils
  from tensorflow.python.tpu import tpu
  from tensorflow.python.util.compat import collections_abc
label_desc: Use image node_id 20 for calling a global function with example usage: preprocess_input_exprs_arg_string(input_exprs_str, safe) and returns: input_dict