def test_double_index(subset_func, subset_func2):
    adata = gen_adata((10, 10))
    obs_subset = subset_func(adata.obs_names)
    var_subset = subset_func2(adata.var_names)
    v1 = adata[obs_subset, var_subset]
    v2 = adata[obs_subset, :][:, var_subset]

    assert np.all(asarray(v1.X) == asarray(v2.X))
    assert np.all(v1.obs == v2.obs)
    assert np.all(v1.var == v2.var)
def test_ccode_loops_add():
    from sympy.tensor import IndexedBase, Idx
    from sympy import symbols
    n, m = symbols('n m', integer=True)
    A = IndexedBase('A')
    x = IndexedBase('x')
    y = IndexedBase('y')
    z = IndexedBase('z')
    i = Idx('i', m)
    j = Idx('j', n)

    s = (
        'for (int i=0; i<m; i++){\n'
        '   y[i] = x[i] + z[i];\n'
        '}\n'
        'for (int i=0; i<m; i++){\n'
        '   for (int j=0; j<n; j++){\n'
        '      y[i] = x[j]*A[%s] + y[i];\n' % (i*n + j) +\
        '   }\n'
        '}'
    )
    c = ccode(A[i, j]*x[j] + x[i] + z[i], assign_to=y[i])
    assert c == s