code: def test_more_mixed_type(self):
      g = r_[-10.1, np.array([1]), np.array([2, 3, 4]), 10.0]
      assert_(g.dtype == "f8")
  
imports: import pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_almost_equal, assert_array_almost_equal, assert_raises, assert_raises_regex
  from numpy.lib.index_tricks import mgrid, ogrid, ndenumerate, fill_diagonal, diag_indices, diag_indices_from, index_exp, ndindex, r_, s_, ix_
label_desc: Use image node_id 3 for calling the TestConcatenator obj's underlying member method code with example usage: obj.test_more_mixed_type() without return types