python 统计列表中相同key的字典

def c_dict():
    """
    [
        {
            "type": "折扣",
            "word": "9折"
        },
        {
            "type": "折扣",
            "word": "满两件8折"
        },
        {
            "type": "折扣",
            "word": "满5件5折"
        },
        {
            "type": "买赠",
            "word": "买1增1"
        },
        {
            "type": "满减",
            "word": "满100减10"
        },
        {
            "type": "满减",
            "word": "满200减30"
        }
    ]
    转化成
    [
        {
            "type": "折扣",
            "words": [
                "9折",
                "满两件8折",
                "满5件5折"
            ],
            "number": 3
        },
        {
            "type": "买赠",
            "words": [
                "买1增1"
            ],
            "number": 1
        },
        {
            "type": "满减",
            "words": [
                "满100减10",
                "满200减30"
            ],
            "number": 2
        }
    ]
    """
    tmp_site_type = [
        {'type': '折扣', 'word': '9折'},
        {'type': '折扣', 'word': '满两件8折'},
        {'type': '折扣', 'word': '满5件5折'},
        {'type': '买赠', 'word': '买1增1'},
        {'type': '满减', 'word': '满100减10'},
        {'type': '满减', 'word': '满200减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))

参考：https://www.jianshu.com/p/70dac7574491