code: def test_str_rule():
      rule = "a <= 10.0 and b > 3.0"
      assert_equal(rule, str(Rule(rule)))
  
imports: from sklearn.utils.testing import assert_equal, assert_not_equal
  from skrules import Rule, replace_feature_name
label_desc: Use image node_id 3 for calling a global function with example usage: test_str_rule() without return types