使用pymongo提取文档数组中的子对象

import pymongo

client = pymongo.MongoClient("mongodb://localhost:27017/")
db = client["your_database_name"]
collection = db["your_collection_name"]

pipeline = [
    {"$unwind": "$your_array_field"},  # 将文档数组展开为多个文档
    {"$project": {"your_subobject_field": "$your_array_field.your_subobject_field"}}  # 提取子对象字段
]

result = collection.aggregate(pipeline)
for doc in result:
    print(doc)