code: def test_global():
      """Test for global assumptions"""
      global_assumptions.add(x > 0)
      assert (x > 0) in global_assumptions
      global_assumptions.remove(x > 0)
      assert not (x > 0) in global_assumptions
      # same with multiple of assumptions
      global_assumptions.add(x > 0, y > 0)
      assert (x > 0) in global_assumptions
      assert (y > 0) in global_assumptions
      global_assumptions.clear()
      assert not (x > 0) in global_assumptions
      assert not (y > 0) in global_assumptions
  
imports: from sympy.abc import x, y
  from sympy.assumptions.assume import global_assumptions
  from sympy.assumptions.ask import Q
  from sympy.printing import pretty
label_desc: Use image node_id 3 for calling a global function with example usage: test_global() without return types