编写函数处理user_list，新方法

写函数，完成以下功能: 
# 例如有:

user_list=[
    {"name": "alex","hobby":"抽烟"},
    {"name" :"alex","hobby":"喝酒"},
    {"name" :"alex","hobby":"烫头"},
    {"name":"wusir","hobby":"喊麦"},
    {"name":"wusir","hobby":"街舞"},
          ]

# 编写函数处理user_list 并返回如下结果:
# [{"name":"alex","hobby_list": ["抽烟"，"喝酒"，"烫头"]},
# {"name":"wuhir","hobby_list": ["喊麦"，"街舞"]},]

old_dict = dict()
aim_list = []

for a in user_list:
    k, v = a.values()
    old_dict.setdefault(k, []).append(v)

# old_dict = {'alex': ['抽烟', '喝酒', '烫头'], 'wusir': ['喊麦', '街舞']}

for k, v in old_dict.items():
    new_dict = dict()
    new_dict['name'] = k
    new_dict['hobby'] = v
    aim_list.append(new_dict)

print(aim_list)