code: def tol():
      """Numerical tolerance for equality tests. Returns a different tolerance for tests
      probing analytic or non-analytic devices, which allows us to define the
      standard for deterministic or stochastic test results dynamically.
      """
  
      def _tol(shots):
          if shots is None:
              return float(os.environ.get("TOL", TOL))
          return TOL_STOCHASTIC
  
      return _tol
  
file_path: pennylane/pennylane/devices/tests/conftest.py
imports: import argparse
  import os
  import numpy
  import pytest
  from _pytest.runner import pytest_runtest_makereport
  import pennylane
label_desc: Use image node_id 1 for calling a global function with example usage: tol() and returns: _tol, TOL_STOCHASTIC, float