从virtualenv中选择python解释器时，请确保系统PYTHONPATH包括site-packages文件夹。就像快照一样。
然后，您不需要将它们一个接一个地添加到PYTHONPATH中。您将需要重新启动Eclipse（“刷新”无效）。新模型将被添加。
更新：我在virtualenv中检查了PYTHONPATH。我发现sys.path中还有一些其他路径。它们是系统默认的python安装位置。这些路径包括基本模型，例如copy和json。
PS：我的环境是Max OSX 10.8。请通过以下方式检查您自己平台的输出print sys.path
/Users/username/.virtualenvs/test/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg
/Users/username/.virtualenvs/test/lib/python2.7/site-packages/pip-1.1-py2.7.egg
/Users/username/.virtualenvs/test/lib/python27.zip
/Users/username/.virtualenvs/test/lib/python2.7
/Users/username/.virtualenvs/test/lib/python2.7/plat-darwin
/Users/username/.virtualenvs/test/lib/python2.7/plat-mac
/Users/username/.virtualenvs/test/lib/python2.7/plat-mac/lib-scriptpackages
/Users/username/.virtualenvs/test/lib/python2.7/lib-tk
/Users/username/.virtualenvs/test/lib/python2.7/lib-old
/Users/username/.virtualenvs/test/lib/python2.7/lib-dynload
/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7
/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin
/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk
/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac
/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages
/Users/username/.virtualenvs/test/lib/python2.7/site-packages
我认为这是virtualenv的要求。您需要将这些路径添加到pydev系统PYTHONPATH中。然后，您可以使用这些基本模块。
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