code: def test_add_mul(dtype, opname, exp):
      a = pd.array([0, 1, None, 3, 4], dtype=dtype)
      b = pd.array([1, 2, 3, None, 5], dtype=dtype)
  
      # array / array
      expected = pd.array(exp, dtype=dtype)
  
      op = getattr(operator, opname)
      result = op(a, b)
      tm.assert_extension_array_equal(result, expected)
  
      op = getattr(ops, "r" + opname)
      result = op(a, b)
      tm.assert_extension_array_equal(result, expected)
  
imports: import operator
  import numpy
  import pytest
  import pandas
  import pandas._testing
  from pandas.core import ops
  from pandas.core.arrays import FloatingArray
label_desc: Use image node_id 1 for calling a global function with example usage: test_add_mul(dtype, opname, exp) without return types