code: def test_physical_quantities(self):
      a = PhysicalQuantity(0.0)
      b = PhysicalQuantity(1.0)
      assert_equal(linspace(a, b), linspace(0.0, 1.0))
  
imports: import pytest
  from numpy import logspace, linspace, geomspace, dtype, array, sctypes, arange, isnan, ndarray, sqrt, nextafter, stack, errstate
  from numpy.testing import assert_, assert_equal, assert_raises, assert_array_equal, assert_allclose
label_desc: Use image node_id 8 for calling the TestLinspace obj's underlying member method code with example usage: obj.test_physical_quantities() without return types