问题
I'm using pyodbc to connect SQL Server. I had created connection string like this:
from sqlalchemy import Table, Column, databases, Integer, String, ForeignKey, create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import session
engine = create_engine('mssql+pyodbc://sa:123@localhost/TrainQuizDB')
engine.connect()
TrainQuizDB is database name that I created in Sql Server.
For more information I have windows 8.1 64bit and I installed python version 3.5.1 32bit and I downloaded pyodbc from http://www.lfd.uci.edu/~gohlke/pythonlibs/#pyodbc (pyodbc-3.0.10-cp35-none-win32.whl). But when I try to connect it cause this error:
sqlalchemy.exc.DBAPIError: (pyodbc.Error) ('IM002', '[IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified (0) (SQLDriverConnect)')
Also I have tested the connection In ODBC Data sources and it was successful.
回答1:
As noted in the relevant section of the SQLAlchemy documentation:
Hostname-based connections are not preferred, however are supported. The ODBC driver name must be explicitly specified
So, you need to add the driver name to your connection string:
engine = create_engine('mssql+pyodbc://sa:123@localhost/TrainQuizDB?driver=ODBC+Driver+17+for+SQL+Server')
来源：https://stackoverflow.com/questions/37161574/using-pyodbc-cause-error-data-source-name-not-found-and-no-default-driver-speci