SQLAlchemy 和 VirtualEnv 的问题

Question

我正在尝试在 OS X 10.5 上的 virtualenv 下使用 SQLAlchemy，但似乎无法加载它。

这就是我所做的

mkvirtualenv --no-site-packages test
easy_install sqlalchemy

我尝试从解释器导入 sqlalchemy，一切正常，但如果我尝试从 python 脚本导入 sqlalchemy，我收到以下错误：

这是来自IBM的教程脚本

from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Table, Column, Integer, String, MetaData, ForeignKey

Base = declarative_base()
class Filesystem(Base):
    __tablename__ = 'filesystem'

    path = Column(String, primary_key=True)
    name = Column(String)

    def __init__(self, path,name):
        self.path = path
        self.name = name

    def __repr__(self):
        return "<Metadata('%s','%s')>" % (self.path,self.name)

我尝试运行“python test.py”，结果如下：

$ python test.py 
Traceback (most recent call last):
  File "test.py", line 4, in <module>
    from sqlalchemy import Table, Column, Integer, String, MetaData, ForeignKey
  File "/Users/grant/Development/Aircraft/sqlalchemy.py", line 3, in <module>
    from sqlalchemy.ext.declarative import declarative_base
ImportError: No module named ext.declarative

这是我的 sys.path 中的内容

>>> import sys
>>> print '\n'.join(sys.path)

/Users/grant/Development/Python/test/lib/python2.6/site-packages/setuptools-0.6c9-py2.6.egg
/Users/grant/Development/Python/test/lib/python2.6/site-packages/SQLAlchemy-0.5.4p2-py2.6.egg
/Users/grant/Development/Python/test/lib/python26.zip
/Users/grant/Development/Python/test/lib/python2.6
/Users/grant/Development/Python/test/lib/python2.6/plat-darwin
/Users/grant/Development/Python/test/lib/python2.6/plat-mac
/Users/grant/Development/Python/test/lib/python2.6/plat-mac/lib-scriptpackages
/Users/grant/Development/Python/test/lib/python2.6/lib-tk
/Users/grant/Development/Python/test/lib/python2.6/lib-old
/Users/grant/Development/Python/test/lib/python2.6/lib-dynload
/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6
/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-darwin
/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-tk
/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-mac
/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/plat-mac/lib-scriptpackages
/Users/grant/Development/Python/test/lib/python2.6/site-packages

有什么想法吗？？

Answer 1

我解决了我自己的问题...我正在使用的同一个文件夹中有另一个名为 sqlalchemy.py 的脚本，它把所有东西都搞砸了。