human
Solve the following python programming problem given the following code:
def test_splittable_apply() : 
    def f(x) : 
        pass 
((chunk, chunk_expr), (agg, agg_expr)) = split (t, t.amount.apply (f, 'var * int', splittable = True)) 
    assert chunk_expr.isidentical (chunk.amount.apply (f, 'var * int', splittable = True)) 
    assert agg_expr.isidentical (f) 

    
    

    Fix the buggy line: assert agg_expr.isidentical (f)
assistant
#Here is Python program to fix the buggy line: assert agg_expr.

assert agg_expr.isidentical (agg)