code: def computeRealInput(self, N, M):
      inputs = []
      expected = []
      for n in range(N):
          inputs.append([float(i) for i in range(n * M, (n + 1) * M)])
  
      for m in range(M):
          expected.append([i for i in range(m, N * M, M)])
      return inputs, expected
  
file_path: essentia/test/src/unittests/standard/test_multiplexer.py
imports: from essentia_test import *
label_desc: Use image node_id 1 for calling the TestMultiplexer obj's underlying member method code with example usage: obj.computeRealInput(N, M) and returns: inputs,  expected