code: def test_non_string_update_fails(self, fdata):
      unitdata = cat.UnitData()
      with pytest.raises(TypeError):
          unitdata.update(fdata)
  
imports: import warnings
  import pytest
  import numpy
  import matplotlib
  from matplotlib.axes import Axes
  import matplotlib.pyplot
  import matplotlib.category
  from matplotlib.testing.decorators import check_figures_equal
label_desc: Use image node_id 4 for calling the TestUnitData obj's underlying member method code with example usage: obj.test_non_string_update_fails(fdata) without return types