human
Solve the following python programming problem given the following code:
@ SkipTest 
def test_cell_partition(self) : 
    def get_cell_partition(expr, dim_sizes, child_idx) : 
        children = expr.children () 
        children = [c.input.input for c in children] 
        child_schemes = [c.scheme () for c in children] 
        conditions = myrialang.convert_nary_conditions (expr.conditions, child_schemes) 
        return myrialang.HCShuffleBeforeNaryJoin.get_cell_partition (dim_sizes, conditions, child_schemes, child_idx, children [child_idx].hashed_columns) 
expr = testNaryJoin.get_phys_plan_root ('A(x,y,z):-R(x,y),S(y,z),T(z,x)', 64, { 
        'R' : 1, 
        'S' : 100, 
        'T' : 20, 
}) 
    dim_sizes = [1, 2, 2] 
    self.assertEqual (get_cell_partition (expr, dim_sizes, 0), [[0, 1], [2, 3]]) 
    self.assertEqual (get_cell_partition (expr, dim_sizes, 1), [[0], [1], [2], [3]]) 
    self.assertEqual (get_cell_partition (expr, dim_sizes, 2), [[0, 2], [1, 3]]) 
    expr = testNaryJoin.get_phys_plan_root ('A(x,y,z,p):-R(x,y),S(y,z),T(z,p)', 64) 
    dim_sizes = [2, 2] 
    self.assertEqual (get_cell_partition (expr, expr, 0), [[0, 1], [2, 3]]) 
    self.assertEqual (get_cell_partition (expr, dim_sizes, 1), [[0], [1], [2], [3]]) 
    self.assertEqual (get_cell_partition (expr, dim_sizes, 2), [[0, 2], [1, 3]]) 

    
    

    Fix the buggy line: self.assertEqual (get_cell_partition (expr, expr, 0), [[0, 1], [2, 3]])
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual (get_cell_partition (expr, dim_sizes, 0), [[0, 1], [2, 3]])