code: def test_CDL3BLACKCROWS():
      o = np.array(
          [
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              39.00,
              40.32,
              40.51,
              38.09,
              35.00,
          ]
      )
      h = np.array(
          [
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              40.84,
              41.69,
              40.84,
              38.12,
              35.50,
          ]
      )
      l = np.array(
          [
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              35.80,
              39.26,
              36.73,
              33.37,
              30.03,
          ]
      )
      c = np.array(
          [
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.29,
              40.46,
              37.08,
              33.37,
              30.03,
          ]
      )
  
      r = stream.CDL3BLACKCROWS(o, h, l, c)
      assert r == -100
  
file_path: ta-lib-python/tests/test_stream.py
imports: import numpy
  import pandas
  import talib
  from talib import stream
label_desc: Use image node_id 3 for calling a global function with example usage: test_CDL3BLACKCROWS() without return types