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  1. Mar 2018
  2. docs.sqlalchemy.org docs.sqlalchemy.org
    Session Basics — SQLAlchemy 1.2 Documentation
    1
    1. hmstepanek 15 Mar 2018
      Session = sessionmaker(bind=some_engine)

      A session is bound to the engine and therefore it's resources. When a session is created it grabs a connection from the existing pool of resources bound to the engine.

      connection_pools
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    docs.sqlalchemy.org/en/latest/orm/session_basics.html
  3. github.com github.com
    hypothesis/h
    2
    1. hmstepanek 15 Mar 2018
      if session_factory is None: session_factory = _get_session

      I'm pretty sure we have multiple code challenges on this. It doesn't do what you think it does! And regardless it wouldn't do that anyway because the engine and pool are created outside of this statement.

      scalabilty
    2. hmstepanek 15 Mar 2018
      _get_session

      This is the function that creates a connection pool.

      scalabilty
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    github.com/hypothesis/h/blob/master/h/streamer/streamer.py