不同于python sys.path的IPython sys.path

Question

我通常使用IPython，直到最近才注意到常规python shell中导入的搜索路径是错误的。据我所知，sys.path继承自PYTHONPATH (虽然我不知道PYTHONPATH住在哪里)，这在IPython中是不同的吗？我担心这会影响装置。举个例子，我刚刚试着

pip install --upgrade gensim

它失败了，因为它无法解析我已经安装的scipy依赖项。因此，我深入研究了Ipython

import gensim
gensim.__version__

在python中返回.9.1

import gensim
gensim.__version__

返回.8.9

下面是sys.path的Ipython版本：

['',
    '/Users/change/anaconda/bin',
    '/Users/change/anaconda/lib/python2.7/site-packages/pybing-0.12-py2.7.egg',
    '/Users/change/anaconda/lib/python2.7/site-packages/httplib2-0.8-py2.7.egg',
    '/Users/change/anaconda/python.app/Contents/lib/python27.zip',
    '/Users/change/anaconda/python.app/Contents/lib/python2.7',
    '/Users/change/anaconda/python.app/Contents/lib/python2.7/plat-darwin',
    '/Users/change/anaconda/python.app/Contents/lib/python2.7/plat-mac',
    '/Users/change/anaconda/python.app/Contents/lib/python2.7/plat-mac/lib-scriptpackages',
    '/Users/change/anaconda/python.app/Contents/lib/python2.7/lib-tk',
    '/Users/change/anaconda/python.app/Contents/lib/python2.7/lib-old',
    '/Users/change/anaconda/python.app/Contents/lib/python2.7/lib-dynload',
    '/Users/change/anaconda/lib/python2.7/site-packages',
    '/Users/change/anaconda/lib/python2.7/site-packages/PIL',
    '/Users/change/anaconda/lib/python2.7/site-packages/pygoogle',
    '/Users/change/anaconda/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg-info',
    '/Users/change/anaconda/lib/python2.7/site-packages/IPython/extensions']

和常规的python脚本sys.path：

['',
'/Users/change/anaconda/lib/python2.7/site-packages/pybing-0.12-py2.7.egg',
'/Users/change/anaconda/lib/python2.7/site-packages/httplib2-0.8-py2.7.egg',
'/Users/change/anaconda/lib/python27.zip',
'/Users/change/anaconda/lib/python2.7',
'/Users/change/anaconda/lib/python2.7/plat-darwin',
'/Users/change/anaconda/lib/python2.7/plat-mac',
'/Users/change/anaconda/lib/python2.7/plat-mac/lib-scriptpackages',
'/Users/change/anaconda/lib/python2.7/lib-tk',
'/Users/change/anaconda/lib/python2.7/lib-old',
'/Users/change/anaconda/lib/python2.7/lib-dynload',
'/Users/change/anaconda/lib/python2.7/site-packages',
'/Users/change/anaconda/lib/python2.7/site-packages/PIL',
'/Users/change/anaconda/lib/python2.7/site-packages/pygoogle',
'/Users/change/anaconda/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg-info']

Answer 1

现在对你来说可能太晚了，但这里的答案可能对你也有帮助：ipython reads wrong python version。基本上，ipython脚本可以直接引用特定的python二进制文件，而不是直接运行python时得到的文件。

Answer 2

我的mac上安装了Python的brew版本。由于某些原因，它不能使用系统库。在python之后，它再次工作，因为默认的brew uninstall python被切换回/usr/bin/python。

另外，尝试使用which python、which ipython并打开/usr/bin/python、/usr/local/bin/python、/usr/bin/ipython和/usr/local/bin/ipython并在其中进行导入，可能会帮助您找出问题所在。

Answer 3

您可能激活了忽略系统路径的虚拟环境。

可以通过在终端中运行此命令来修复(在关闭笔记本等之后)：

virtualenv --system-site-packages ~