class_docstr: python metrix unittest 
class_docstr_tok: ["python","metrix","unittest"]
docstr: tear down 
docstr_tok: ["tear","down"]
code: def tearDown(self):
      """tear down"""
      if os.path.exists(self.conf_file):
          os.unlink(self.conf_file)
  
file_path: delta/delta/utils/metrics/py_metrics_test.py
imports: import os
  from pathlib import Path
  import tempfile
  import numpy
  import delta.compat
  from delta import utils
  from delta.utils import metrics
  from delta import PACKAGE_ROOT_DIR
label_desc: Use image node_id 2 for calling the MetricTest obj's underlying member method code with example usage: obj.tearDown() without return types