Hello,
I’m working thru the Question Answering with SQuAD 2.0 module.
I’m stuck in this function:
def add_token_positions(encodings, answers):
    start_positions = []
    end_positions = []
    for i in range(len(answers)):
        start_positions.append(encodings.char_to_token(i, answers[i]['answer_start']))
        end_positions.append(encodings.char_to_token(i, answers[i]['answer_end'] - 1))

        # if start position is None, the answer passage has been truncated
        if start_positions[-1] is None:
            start_positions[-1] = tokenizer.model_max_length
        if end_positions[-1] is None:
            end_positions[-1] = tokenizer.model_max_length

    encodings.update({'start_positions': start_positions, 'end_positions': end_positions})

add_token_positions(train_encodings, train_answers)
add_token_positions(val_encodings, val_answers)

and wondering what
    encodings.update({'start_positions': start_positions, 'end_positions': end_positions})
is actualing doing.
I don’t find documentation or helpful information for this. Is there any information available?
And how can I see the result of this function?
Thanks in advance!