code: def get_skip_exceptions():
      skip_classes = set()
      for module_name in ("unittest", "unittest2", "nose"):
          mod = sys.modules.get(module_name)
          if hasattr(mod, "SkipTest"):
              skip_classes.add(mod.SkipTest)
      return tuple(skip_classes)
  
file_path: catboost/contrib/python/pytest/py2/_pytest/nose.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import sys
  import six
  import pytest
  from _pytest import python
  from _pytest import runner
  from _pytest import unittest
  from _pytest.config import hookimpl
label_desc: Use image node_id 1 for calling a global function with example usage: get_skip_exceptions() and returns: tuple