<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _default_tokenizer_func(content, keyword_weight_pair):
 """ Default tokenizer function that uses jieba tokenizer. :param keyword_weight_pair: maximum pair number of the keyword-weight list. """

    seg_list = jieba.lcut_for_search(content)
    # Extract keyword-weight list by TF-IDF algorithms and by sorted maximum weight
    return jieba.analyse.extract_tags("".join(seg_list), topK=keyword_weight_pair, withWeight=True)