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我在 Eclipse 上的 PyDev 设置中尝试这样做：

from sqlalchemy.engine import create_engine

这给了我以下错误：

Traceback (most recent call last):
  File "/Users/<username>/Documents/workspace/You/src/Ormtest.py", line 7, in <module>
    import sqlalchemy
  File "build/bdist.macosx-10.8-intel/egg/sqlalchemy/__init__.py", line 7, in <module>
    # For license information, see LICENSE.TXT
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/inspect.py", line 39, in <module>
    import tokenize
  File "/Library/Python/2.7/site-packages/nltk/tokenize/__init__.py", line 50, in <module>
    from nltk.data              import load
  File "/Library/Python/2.7/site-packages/nltk/__init__.py", line 106, in <module>
    from decorators import decorator, memoize
  File "/Library/Python/2.7/site-packages/nltk/decorators.py", line 176, in <module>
    @decorator
  File "/Library/Python/2.7/site-packages/nltk/decorators.py", line 154, in decorator
    if inspect.isclass(caller):
AttributeError: 'module' object has no attribute 'isclass'

这在交互式控制台上运行良好。Eclipse 也不会在导入时给我任何错误/警告。知道我在这里想念什么吗？

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1 回答 1

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尝试执行以下操作来诊断它：在给出错误的行中：

import sys
print('\n'.join(sorted(sys.path))) #to know which pythonpath you're using

我的猜测是您在 PYTHONPATH 中添加了“/Library/Python/2.7/site-packages/nltk”（而您可能只应该添加“/Library/Python/2.7/site-packages”）

于 2013-05-09T00:28:46.013 回答