hsliuping/TradingAgents-CN · critical · ImportError

pymongo is not installed. Please install it with: pip instal

Error message

pymongo is not installed. Please install it with: pip install pymongo

What it means

Raised by MongoDBStorage.__init__ when the optional pymongo dependency is not installed (MONGODB_AVAILABLE is False). The module imports pymongo in a try/except at import time and the storage class guards instantiation.

Source

Thrown at tradingagents/config/mongodb_storage.py:33

from tradingagents.utils.logging_manager import get_logger
from tradingagents.config.runtime_settings import get_timezone_name
logger = get_logger('agents')

try:
    from pymongo import MongoClient
    from pymongo.errors import ConnectionFailure, ServerSelectionTimeoutError
    MONGODB_AVAILABLE = True
except ImportError:
    MONGODB_AVAILABLE = False
    MongoClient = None


class MongoDBStorage:
    """MongoDB存储适配器"""
    
    def __init__(self, connection_string: str = None, database_name: str = "tradingagents"):
        if not MONGODB_AVAILABLE:
            raise ImportError("pymongo is not installed. Please install it with: pip install pymongo")
        
        # 修复硬编码问题 - 如果没有提供连接字符串且环境变量也未设置，则抛出错误
        self.connection_string = connection_string or os.getenv("MONGODB_CONNECTION_STRING")
        if not self.connection_string:
            raise ValueError(
                "MongoDB连接字符串未配置。请通过以下方式之一进行配置：\n"
                "1. 设置环境变量 MONGODB_CONNECTION_STRING\n"
                "2. 在初始化时传入 connection_string 参数\n"
                "例如: MONGODB_CONNECTION_STRING=mongodb://localhost:27017/"
            )
        
        self.database_name = database_name
        self.collection_name = "token_usage"
        
        self.client = None
        self.db = None
        self.collection = None
        self._connected = False

View on GitHub (pinned to 74783e8817)

Solutions

1. pip install pymongo
2. Or install the project with the mongodb extra if provided (pip install -e '.[mongodb]')
3. Verify: python -c "import pymongo; print(pymongo.version)"
4. If MongoDB is optional in your flow, catch ImportError and fall back to another storage backend

Example fix

# before
storage = MongoDBStorage()  # ImportError
# after
try:
    from tradingagents.config.mongodb_storage import MongoDBStorage
    storage = MongoDBStorage()
except ImportError:
    storage = None  # or fallback backend

try:
    import pymongo  # noqa
    MONGODB_AVAILABLE = True
except ImportError:
    MONGODB_AVAILABLE = False
if not MONGODB_AVAILABLE:
    # skip mongo-backed path
    pass

try:
    storage = MongoDBStorage(connection_string=cs)
except ImportError as e:
    if 'pymongo' in str(e):
        storage = LocalStorage()  # fallback
    else:
        raise

When it happens

Trigger: Constructing MongoDBStorage(...) in an environment where `import pymongo` failed, e.g. pip install tradingagents without extras, or a venv missing pymongo.

Common situations: Base install without the mongo extra, production image slimmed down, dependency conflicts removing pymongo during a pip resolver pass.

Related errors

• MongoDB连接字符串未配置。请设置环境变量 MONGODB_CONNECTION_STRING\n例如: MONGO
• MongoDB连接字符串未配置。请通过以下方式之一进行配置：\n1. 设置环境变量 MONGODB_CONNECTION
• 无法获取股票 {symbol} 的财务数据。已尝试所有数据源（MongoDB、AKShare、Tushare）均失败。
• name
• Redis连接配置未完整设置。请设置以下环境变量之一：\n1. REDIS_CONNECTION_STRING=redi

AI-assisted analysis of hsliuping/TradingAgents-CN@74783e8817 (2026-08-28). Data as JSON: /api/errors/19b1270eac044979. Report an issue: GitHub.