human
Solve the following python programming problem given the following code:
def convert_to_symbolic_indices(seq, start = None, gen = None, qubit_map = None) : 
    "Returns the circuit with symbolic indices and the
    dictionary mapping symbolic indices to real indices.

    The mapping is 1 to 1 and onto (bijective).

    Parameters
    ==========

    seq : tuple, Gate/Integer/tuple or Mul
        A tuple of Gate, Integer, or tuple objects, or a Mul
    start : Symbol
        An optional starting symbolic index
    gen : object
        An optional numbered symbol generator
    qubit_map : dict
        An existing mapping of symbolic indices to real indices

    All symbolic indices have the format 'i#', where # is
    some number >= 0.
    " 
    if isinstance (seq, Mul) : 
        seq = seq.args 
index_gen = numbered_symbols (prefix = 'i', start = (- 1)) 
    cur_ndx = next (index_gen) 
    ndx_map = { 
        
} 
    def create_inverse_map(symb_to_real_map) : 
        rev_items = (lambda item : tuple ([item [1], item [0]])) 
        return dict (map (rev_items, symb_to_real_map.items ())) 
if (start is not None) : 
        if (not isinstance (start, Symbol)) : 
            msg = ('Expected Symbol for starting index, got %r.' % start) 
            raise TypeError (msg) 
cur_ndx = start 
if (gen is not None) : 
        if (not isinstance (gen, numbered_symbols ().__class__)) : 
            msg = ('Expected a generator, got %r.' % gen) 
            raise TypeError (msg) 
index_gen = gen 
if (qubit_map is not None) : 
        if (not isinstance (qubit_map, dict)) : 
            msg = ('Expected dict for existing map, got ' + ('%r.' % qubit_map)) 
            raise TypeError (msg) 
ndx_map = qubit_map 
ndx_map = _sympify_qubit_map (ndx_map) 
    inv_map = create_inverse_map (ndx_map) 
    sym_seq = () 
    for item in seq : 
        if isinstance (item, Gate) : 
            result = convert_to_symbolic_indices (item.args, qubit_map = ndx_map, start = cur_ndx, gen = index_gen) 
            (sym_item, new_map, cur_ndx, index_gen) = result 
            ndx_map.update (new_map) 
      ...

    
    

    Fix the buggy line: result = convert_to_symbolic_indices (inv_map, qubit_map = ndx_map, start = cur_ndx, gen = index_gen)
assistant
#Here is Python program to fix the buggy line: result = convert_to_symbolic_indices (inv_map, qubit_map = ndx_map, start = cur_ndx, gen = index_gen)
.

result = convert_to_symbolic_indices (item, qubit_map = ndx_map, start = cur_ndx, gen = index_gen)