Invalid argument(s) 'pool_size' sent to create_engine(), using configuration

Invalid argument(s) 'pool_size' sent to create_engine(), using configuration

我们这里测试的是create_engine缺乏参数。

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I create sqlalchemy engine connecting to MySQL database. I want to specify charset as create_engine argument.

If I use create_engine liKe that:

create_engine('mysql+mysqldb://pd:pd@localhost/pd?charset=utf8') 

then all is fine. But, when I use it like that:

create_engine('mysql+mysqldb://pd:pd@localhost/pd', charset='utf8') 

then I get the following error:

from sqlalchemy.pool import SingletonThreadPool

engine = create_engine('sqlite:///mydb.db', poolclass=SingletonThreadPool)

Passing in an explicit pool class also works on 0.6. Personally, I'd use exception handling here:

try:
    engine = create_engine(URL, pool_size=10)
except TypeError:
    # The pool_size argument won't work for the default SQLite setup in SQLAlchemy 0.7, try without
    engine = create_engine(URL)