title: with python sqlalchemy, how do define multiple-column primary key
body: <p>I am following the tutorial at <a href="https://docs.sqlalchemy.org/en/latest/core/tutorial.html" rel="nofollow noreferrer">https://docs.sqlalchemy.org/en/latest/core/tutorial.html</a></p>
  
  <p>I see an example for primary key, it seems to use just one column</p>
  
  <pre><code>&gt;&gt;&gt; users = Table('users', metadata,
  ...     Column('id', Integer, primary_key=True),
  ...     Column('name', String),
  ...     Column('fullname', String),
  ... )
  </code></pre>
  
  <p>how do define primary key with a sequence of columns?</p>