pyMongo删除/修改找到的文档

collection.delete_one(filter)

from pymongo import MongoClient

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

# 删除age为25的第一个文档
result = collection.delete_one({"age": 25})
print(result.deleted_count)  # 打印删除的文档数

collection.delete_many(filter)

from pymongo import MongoClient

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

# 删除age为25的所有文档
result = collection.delete_many({"age": 25})
print(result.deleted_count)  # 打印删除的文档数

collection.update_one(filter, update)

from pymongo import MongoClient

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

# 将age为25的第一个文档的name修改为"John"
result = collection.update_one({"age": 25}, {"$set": {"name": "John"}})
print(result.modified_count)  # 打印修改的文档数

collection.update_many(filter, update)

from pymongo import MongoClient

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

# 将age为25的所有文档的name修改为"John"
result = collection.update_many({"age": 25}, {"$set": {"name": "John"}})
print(result.modified_count)  # 打印修改的文档数