code: def nottest(func):
      """Decorator to mark a function or method as *not* a test"""
      func.__test__ = False
      return func
  
imports: from __future__ import print_function
  import numpy
  import sys
  import os
  import inspect
  import gc
  import pytest
  import functools
  from packaging.version import Version
  from ..util.check_environment import has_backend
label_desc: Use image node_id 5 for calling a global function with example usage: nottest(func) and returns: func