code: def test_DomainScalar_sub():
      A = DomainScalar(ZZ(1), ZZ)
      B = DomainScalar(QQ(2), QQ)
      assert A - B == DomainScalar(QQ(-1), QQ)
  
      raises(TypeError, lambda: A - 1.5)
  
imports: from sympy.testing.pytest import raises
  from sympy.core.symbol import S
  from sympy.polys import ZZ, QQ
  from sympy.polys.matrices.domainscalar import DomainScalar
  from sympy.polys.matrices.domainmatrix import DomainMatrix
label_desc: Use image node_id 10 for calling a global function with example usage: test_DomainScalar_sub() without return types