相关疑难解决方法(0)

我使用sqlalchemy使用psycopg2连接到postgresql服务器.

当我启动以下代码时:

from sqlalchemy.engine.url import URL
from sqlalchemy.engine import create_engine
url = URL(drivername='postgresql', username='myname', password='mypasswd', host='localhost', database='template1')
eng = create_engine(url)
eng.execute('CREATE DATABASE new_db;')

我总是得到以下错误:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.7/site-packages/SQLAlchemy-0.6.6-py2.7.egg/sqlalchemy/engine/base.py", line 1788, in execute
    return connection.execute(statement, *multiparams, **params)
  File "/usr/local/lib/python2.7/site-packages/SQLAlchemy-0.6.6-py2.7.egg/sqlalchemy/engine/base.py", line 1191, in execute
    params)
  File "/usr/local/lib/python2.7/site-packages/SQLAlchemy-0.6.6-py2.7.egg/sqlalchemy/engine/base.py", line 1287, in _execute_text
    return self.__execute_context(context)
  File "/usr/local/lib/python2.7/site-packages/SQLAlchemy-0.6.6-py2.7.egg/sqlalchemy/engine/base.py", line 1302, in __execute_context
    context.parameters[0], context=context)
  File "/usr/local/lib/python2.7/site-packages/SQLAlchemy-0.6.6-py2.7.egg/sqlalchemy/engine/base.py", line 1401, in _cursor_execute
    context)
  File "/usr/local/lib/python2.7/site-packages/SQLAlchemy-0.6.6-py2.7.egg/sqlalchemy/engine/base.py", line 1394, in …