使用SQLAlchemy连接到数据库

Question

我正在尝试连接到本地计算机上的数据库.

import sqlalchemy
engine = sqlalchemy.create_engine('mssql+pyodbc://localhost\\SQLEXPRESS/NCM')

它失败并出现以下错误:

DBAPIError: (pyodbc.Error) ('IM002', '[IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified (0) (SQLDriverConnect)')

并输出此警告:

C:\Miniconda\envs\bees\lib\site-packages\sqlalchemy\connectors\pyodbc.py:82: SAWarning: No driver name specified; this is expected by PyODBC when using DSN-less connections
"No driver name specified; "

我应该在哪里寻找诊断问题？

Answer 1

如此链接所示,从版本1.0.0开始,您需要为主机名连接明确指定驱动程序.

Changed in version 1.0.0: Hostname-based PyODBC connections now require the
SQL Server driver name specified explicitly. SQLAlchemy cannot choose an 
optimal default here as it varies based on platform and installed drivers.