input: Write a function to create a Python function named "Transpile" that takes in four arguments: "src_dir", "dst_dir", "model_filename", and "params_filename". Inside the function, create a CPUPlace object and an Executor object using Paddle Fluid. Then, create a Scope object using fluid.core.Scope(). Load the inference program, feed target names, and fetch targets using fluid.io.load_inference_model() with the "src_dir", "exe", "model_filename", and "params_filename" arguments. Clone the inference program and apply the inference transpiler using fluid.InferenceTranspiler() and t.transpile(). Save the optimized inference program to "dst_dir" using fluid.io.save_persistables() and the "inference_transpiler_program" and "params_filename" arguments. If "dst_dir" does not exist, create it using os.makedirs(). Finally, create a main function that takes in arguments using argparse.ArgumentParser() and calls the "Transpile" function with the parsed arguments.
  assert Transpile("src", "dst", "model", "params") == None
  assert main() == None
  assert isinstance(Transpile, type) == True
  assert isinstance(main, types.FunctionType) == True
output: def Transpile(src_dir, dst_dir, model_filename, params_filename):
      import os
      import paddle.fluid as fluid
  
      place = fluid.CPUPlace()
      exe = fluid.Executor(place)
      scope = fluid.core.Scope()
  
      with fluid.scope_guard(scope):
          [inference_program, feed_target_names, fetch_targets] = fluid.io.load_inference_model(
              dirname=src_dir,
              executor=exe,
              model_filename=model_filename,
              params_filename=params_filename
          )
  
          t = fluid.InferenceTranspiler()
          t.transpile(inference_program, place)
  
          if not os.path.exists(dst_dir):
              os.makedirs(dst_dir)
  
          fluid.io.save_persistables(
              executor=exe,
              dirname=dst_dir,
              main_program=inference_program,
              filename=params_filename
          )
  
  def main():
      import argparse
      parser = argparse.ArgumentParser()
      parser.add_argument("src_dir")
      parser.add_argument("dst_dir")
      parser.add_argument("model_filename")
      parser.add_argument("params_filename")
      args = parser.parse_args()
      Transpile(args.src_dir, args.dst_dir, args.model_filename, args.params_filename)