code: def test_shingle():
      shingle = rrcf.shingle(X, 3)
      step_0 = next(shingle)
      step_1 = next(shingle)
      assert (step_0[1] == step_1[0]).all()
  
file_path: rrcf/test/test_rrcf.py
imports: import json
  import numpy
  import rrcf
label_desc: Use image node_id 11 for calling a global function with example usage: test_shingle() without return types