code: def _get_ctypes_dtype(dt):
      """Return a ctypes c_* datatype given a string data type."""
      if "int" in dt:
          return getattr(ctypes, f"c_{dt}")
      elif dt == "float32":
          return ctypes.c_float
      elif dt == "float64":
          return ctypes.c_double
      else:
          assert False, f"unknown dtype: {dt}"
  
imports: import collections
  import ctypes
  import json
  import os
  import re
  from contextlib import redirect_stderr
  from io import StringIO
  import numpy
  import tvm
  import tvm.relay
  import tvm.testing
  from tvm import meta_schedule
  from tvm import relay
  from tvm.contrib import utils
  from tvm.relay.backend import Executor, Runtime
label_desc: Use image node_id 4 for calling a global function with example usage: _get_ctypes_dtype(dt) and returns: getattr, ctypes, ctypes