code: def __init__(self, package_path=None):
      f = sys._getframe(1)
      if package_path is None:
          package_path = f.f_locals.get("__file__", None)
          if package_path is None:
              raise ValueError("Unable to determine path")
      self.package_path = os.path.dirname(package_path)
      self.package_name = f.f_locals.get("__name__", None)
  
file_path: statsmodels/statsmodels/tools/_testing.py
imports: import os
  import sys
  from packaging.version import Version, parse
  import numpy
  from numpy.testing import assert_allclose, assert_
  import pandas
label_desc: Use image node_id 1 to create a new PytestTester object  with example: obj = PytestTester(package_path)