IPython sys.path与python sys.path不同 [英] IPython sys.path different from python sys.path

问题描述

我通常使用IPython，并且最近才注意到常规python shell中导入的搜索路径是错误的。根据我的理解，sys.path继承自PYTHONPATH（尽管我不知道PYTHONPATH在哪里生活），这在IPython中是不同的？我担心这个有影响的装置。例如我刚试过

I generally use IPython and only recently noticed that the the search path for imports is wrong in the regular python shell. From what I understand, sys.path inherits from PYTHONPATH (although I don't know where PYTHONPATH lives), is this different in IPython? I'm worried that this effecting installations. For instance I just tried

pip install --upgrade gensim

失败了，因为它无法解决我已安装的scipy依赖项。
所以我深入了一点，发现在Ipython中

which failed because it couldn't resolve the scipy dependency, which I already have installed. So I dove a little bit deeper and found in Ipython

import gensim
gensim.__version__

在python中返回.9.1

returns .9.1 while in python

import gensim
gensim.__version__

返回.8.9

以下是Ipython版本的sys.path的样子：

Here is what the Ipython version of sys.path looks like:

['',
    '/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python脚本sys.path：

and the regular python script 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']

推荐答案

现在可能为时已晚，但这里的答案也可能对您有所帮助： ipython读取错误的python版本。基本上，ipython脚本可以直接引用特定的python二进制文件，而不是你直接运行python时获得的那个。

Probably too late for you now, but the answer here may help you too: ipython reads wrong python version . Basically the ipython script can directly reference a specific python binary rather than the one that you'd get if you just ran python directly.

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