code: def test_DMP___bool__():
      assert bool(DMP([[]], ZZ)) is False
      assert bool(DMP([[ZZ(1)]], ZZ)) is True
  
imports: from sympy.functions.elementary.miscellaneous import sqrt
  from sympy.polys.domains import ZZ, QQ
  from sympy.polys.polyclasses import DMP, DMF, ANP
  from sympy.polys.polyerrors import CoercionFailed, ExactQuotientFailed, NotInvertible
  from sympy.polys.specialpolys import f_polys
  from sympy.testing.pytest import raises, warns_deprecated_sympy
label_desc: Use image node_id 4 for calling a global function with example usage: test_DMP___bool__() without return types