Python连接MongoDB数据库并实现基本数据操作

pip install pymongo

from pymongo import MongoClient

# 连接到MongoDB
# 默认连接到本地MongoDB服务
client = MongoClient('mongodb://localhost:27017/')

# 选择数据库
db = client['your_database_name']

# 选择集合
collection = db['your_collection_name']

## 插入单个文档
document = {"name": "John", "age": 30, "city": "New York"}
collection.insert_one(document)

# 插入多个文档
documents = [
    {"name": "Jane", "age": 25, "city": "Los Angeles"},
    {"name": "Doe", "age": 40, "city": "Chicago"}
]
collection.insert_many(documents)

# 查询单个文档
query = {"name": "John"}
result = collection.find_one(query)
print(result)

# 查询多个文档
results = collection.find({"city": "New York"})
for doc in results:
    print(doc)

# 更新单个文档
query = {"name": "John"}
new_values = {"$set": {"age": 31}}
collection.update_one(query, new_values)

# 更新多个文档
new_values = {"$set": {"city": "Boston"}}
collection.update_many({"city": "New York"}, new_values)

# 删除单个文档
query = {"name": "John"}
collection.delete_one(query)

# 删除多个文档
collection.delete_many({"city": "Chicago"})