class_docstr: Unit tests for the counts.process_samples method
docstr: Test that the counts function outputs counts of the right size for observables
docstr_tok: ["Test","that","the","counts","function","outputs","counts","of","the","right","size","for","observables"]
code: def test_counts_obs(self):
      """Test that the counts function outputs counts of the right size for observables"""
      shots = 1000
      samples = np.random.choice([0, 1], size=(shots, 2)).astype(
          np.int64
      )
  
      result = qml.counts(qml.PauliZ(0)).process_samples(
          samples, wire_order=[0]
      )
  
      assert len(result) == 2
      assert set(result.keys()) == {1, -1}
      assert result[1] == np.count_nonzero(samples[:, 0] == 0)
      assert result[-1] == np.count_nonzero(samples[:, 0] == 1)
  
imports: import copy
  import numpy
  import pytest
  import pennylane
  from pennylane.measurements import AllCounts, Counts, CountsMP
  from pennylane.wires import Wires
label_desc: Use image node_id 4 for calling the TestProcessSamples obj's underlying member method code with example usage: obj.test_counts_obs() without return types