veekun_pokedex/pokedex/db/__init__.py

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from sqlalchemy import MetaData, Table, create_engine, orm
from .tables import metadata
def connect(uri):
"""Connects to the requested URI. Returns a session object.
Calling this function also binds the metadata object to the created engine.
"""
### Do some fixery for MySQL
if uri[0:5] == 'mysql':
# MySQL uses latin1 for connections by default even if the server is
# otherwise oozing with utf8; charset fixes this
if 'charset' not in uri:
uri += '?charset=utf8'
# Tables should be InnoDB, in the event that we're creating them, and
# use UTF-8 goddammit!
for table in metadata.tables.values():
table.kwargs['mysql_engine'] = 'InnoDB'
table.kwargs['mysql_charset'] = 'utf8'
### Connect
engine = create_engine(uri)
conn = engine.connect()
metadata.bind = engine
sm = orm.sessionmaker(autoflush=True, autocommit=False, bind=engine)
session = orm.scoped_session(sm)
return session