code: def test_binary_symbols():
      x = Symbol("x")
      y = Symbol("y")
      z = Symbol("z")
      assert Contains(x, FiniteSet(y, Eq(z, True))).binary_symbols == {
          y,
          z,
      }
  
file_path: sympy/sympy/sets/tests/test_contains.py
imports: from sympy.core.expr import unchanged
  from sympy.core.numbers import oo
  from sympy.core.relational import Eq
  from sympy.core.singleton import S
  from sympy.core.symbol import Symbol
  from sympy.sets.contains import Contains
  from sympy.sets.sets import FiniteSet, Interval
  from sympy.testing.pytest import raises
label_desc: Use image node_id 4 for calling a global function with example usage: test_binary_symbols() without return types