code: def fixture_lmdb(request):
      """fixture_lmdb"""
      path = os.path.join(
          os.path.dirname(os.path.abspath(__file__)),
          "test_lmdb",
          "data.mdb",
      )
      tmp_path = tempfile.mkdtemp()
      filename = os.path.join(tmp_path, "data.mdb")
      shutil.copy(path, filename)
  
      def fin():
          shutil.rmtree(tmp_path)
  
      request.addfinalizer(fin)
  
      args = filename
      func = tfio.IODataset.from_lmdb
      expected = [
          (str(i).encode(), str(chr(ord("a") + i)).encode())
          for i in range(10)
      ]
  
      return args, func, expected
  
imports: import os
  import sys
  import time
  import shutil
  import tempfile
  import numpy
  import pytest
  import tensorflow
  import tensorflow_io
label_desc: Use image node_id 6 for calling a global function with example usage: fixture_lmdb(request) and returns: args,  func,  expected