code: def test_precision_reference_smaller():
      result = precision(("s1", "s2", "s3", "s4", "s5"), ("s1",))
  
      assert result == approx(0.2)
  
imports: from __future__ import absolute_import
  from __future__ import division, print_function, unicode_literals
  import pytest
  from pytest import approx
  from sumy.evaluation import precision, recall, f_score
label_desc: Use image node_id 4 for calling a global function with example usage: test_precision_reference_smaller() without return types