pymongo查询在管道后从字符串转换为双精度

from pymongo import MongoClient

# 连接MongoDB数据库
client = MongoClient('mongodb://localhost:27017/')
db = client['mydatabase']
collection = db['mycollection']

# 构建查询管道
pipeline = [
    {
        '$match': {
            'field': 'value'
        }
    },
    {
        '$project': {
            'field': {
                '$toDouble': '$field'
            }
        }
    }
]

# 执行查询
result = collection.aggregate(pipeline)

# 遍历查询结果
for doc in result:
    print(doc)