title: Sqlalchemy Insert - AttributeError: object has no attribute 'items'
body: <p>I have a msyql table with a datetime column. I am trying to use python's datetime.datetime.now() and insert into it with sqlalchemy core. </p>
  
  <pre><code>from sqlalchemy import MetaData, create_engine, Table, insert 
  import datetime 
  # from sqlalchemy.sql import func
  engine = create_engine('...') 
  conn = engine.connect() 
  
  tablemeta = MetaData(bind=engine, reflect=True) 
  
  datetime_test_table = Table('datetime_test', tablemeta, autoload=True, 
          autoload_with=engine) 
  
  ins = insert(datetime_test_table).values(datetime.datetime.now()) 
  conn.execute(ins)
  </code></pre>
  
  <p>I get the following error : </p>
  
  <p><code>AttributeError: 'datetime.datetime' object has no attribute 'items'
  </code></p>
  
  <p>I tried using func.now() as well, but a similar error occurs. What object should I use to do the insertion?</p>