docstr: ...Test varray append functions
          
docstr_tok: ["...","Test","varray","append","functions"]
code: def test_varray_append(self):
      """...Test varray append functions"""
      size = 12
      np.testing.assert_array_almost_equal(
          test.test_VArrayDouble_append1(size), np.arange(size)
      )
  
      np.testing.assert_array_almost_equal(
          test.test_VArrayDouble_append(
              self.python_array_1, self.python_array_2
          ),
          np.hstack((self.python_array_1, self.python_array_2)),
      )
  
imports: import unittest
  import numpy
  from numpy.linalg import norm
  from tick.array_test.build import array_test
  from scipy.sparse import csr_matrix
  import itertools
label_desc: Use image node_id 35 for calling the Test obj's underlying member method code with example usage: obj.test_varray_append() without return types