code: def test_symbol(poly, tgt):
      p = poly([1, 2, 3], symbol="z")
      assert_equal(f"{p:unicode}", tgt)
  
imports: from math import nan, inf
  import pytest
  from numpy.core import array, arange, printoptions
  import numpy.polynomial
  from numpy.testing import assert_equal, assert_
  from fractions import Fraction
  from decimal import Decimal
label_desc: Use image node_id 5 for calling a global function with example usage: test_symbol(poly, tgt) without return types