def c_dict():
    """
    [
        {
            "type": "折扣",
            "word": "9折"
        },
        {
            "type": "折扣",
            "word": "滿兩件8折"
        },
        {
            "type": "折扣",
            "word": "滿5件5折"
        },
        {
            "type": "買贈(zèng)",
            "word": "買1增1"
        },
        {
            "type": "滿減",
            "word": "滿100減10"
        },
        {
            "type": "滿減",
            "word": "滿200減30"
        }
    ]
    轉(zhuǎn)化成
    [
        {
            "type": "折扣",
            "words": [
                "9折",
                "滿兩件8折",
                "滿5件5折"
            ],
            "number": 3
        },
        {
            "type": "買贈(zèng)",
            "words": [
                "買1增1"
            ],
            "number": 1
        },
        {
            "type": "滿減",
            "words": [
                "滿100減10",
                "滿200減30"
            ],
            "number": 2
        }
    ]
    """
    tmp_site_type = [
        {'type': '折扣', 'word': '9折'},
        {'type': '折扣', 'word': '滿兩件8折'},
        {'type': '折扣', 'word': '滿5件5折'},
        {'type': '買贈(zèng)', 'word': '買1增1'},
        {'type': '滿減', 'word': '滿100減10'},
        {'type': '滿減', 'word': '滿200減30'}
    ]

    tmp_dict = dict()
    for l in tmp_site_type:
        if l.get("type") in tmp_dict:
            i += 1
            tmp_dict[l.get("type")]["words"].append(l.get("word"))
            tmp_dict[l.get("type")]["count"] = i
        else:
            i = 1
            tmp = {"words": [l.get("word")]}
            tmp_dict[l.get("type")] = tmp

    tmp_list = list()
    for key, value in tmp_dict.items():
        tmp_list.append({
            'type': key,
            'words': value.get('words'),
            'number': len(value.get('words'))
        })
    import json

    print(json.dumps(tmp_site_type, indent=4, ensure_ascii=False))
    print(json.dumps(tmp_dict, indent=4, ensure_ascii=False))
    print(json.dumps(tmp_list, indent=4, ensure_ascii=False))

參考：http://www.itdecent.cn/p/70dac7574491