title: Connecting to database using SQLAlchemy
body: <p>I'm trying to connect to a database on my local machine.</p>
  
  <pre><code>import sqlalchemy
  engine = sqlalchemy.create_engine('mssql+pyodbc://localhost\\SQLEXPRESS/NCM')
  </code></pre>
  
  <p>It fails with the following error:</p>
  
  <pre><code>DBAPIError: (pyodbc.Error) ('IM002', '[IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified (0) (SQLDriverConnect)')
  </code></pre>
  
  <p>And also outputs this warning:</p>
  
  <pre><code>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; "
  </code></pre>
  
  <p>Where should I be looking to diagnose the problem?</p>