code: def test_label_method(op, label):
      """Test non-cache label functionality."""
      assert op.label() == label
      assert op.label(decimals=5) == label
      assert op.label(base_label="obs") == "obs"
  
imports: import functools
  import pickle
  import pytest
  import numpy
  from gate_data import I, X, Y, Z, H
  import pennylane
  from pennylane.ops.qubit.observables import BasisStateProjector, StateVectorProjector
label_desc: Use image node_id 2 for calling a global function with example usage: test_label_method(op, label) without return types