python - Enthought python包导入优先级

Question

我正在使用 venv 从 PyPI 安装比根环境中可用的更新版本的 elpy 包。从 pip 查询，我看到 elpy 的以下版本:

~/python/standalone $ pip show elpy
---
Name: elpy
Version: 1.4.2
Location: /home/wdkrnls/python/env/local/lib/python2.7/site-packages
Requires: flake8

但是，使用解释器为我提供了根环境版本。

In [4]: import elpy
In [5]: elpy.__version__
Out[5]: '1.3.0'
In [6]: ?elpy
Type:       module
String Form:<module 'elpy' from '/home/ipython/Enthought2/lib/python2.7/site-packages/elpy/__init__.pyc'>
File:       /home/ipython/Enthought/lib/python2.7/site-packages/elpy/__init__.py
Docstring:
The Emacs Lisp Python Environment.

为什么会发生这种情况，我该如何解决？

我的 sys.path 很乱，我不知道如何清理它(我过去升级过 Canopy 发行版)，但这里是:

['',
 '/home/wdkrnls/python/env/local/bin',
 '/home/wdkrnls/python/env/local/lib/python2.7/site-packages/jediepcserver-0.0.0-py2.7.egg',
 '/home/wdkrnls/python/env/local/lib/python2.7/site-packages/epc-0.0.5-py2.7.egg',
 '/home/wdkrnls/python/env/local/lib/python2.7/site-packages/sexpdata-0.0.3-py2.7.egg',
 '/home/ipython/Enthought2/lib/python2.7/site-packages/PyCifRW-3.3-py2.7-linux-x86_64.egg',
 '/home/ipython/Enthought2/lib/python2.7/site-packages/graphtool-0.5.2-py2.7.egg',
 '/home/ipython/Enthought2/lib/python2.7/site-packages',
 '/home/wdkrnls/python/env/local/lib/python2.7/site-packages/argparse-1.2.1-py2.7.egg',
 '/share/apps/python/Canopy/appdata/canopy-1.3.0.1715.rh5-x86_64/lib/python2.7/site-packages',
 '/home/ipython/Enthought/Canopy_64bit/User/lib/python2.7/site-packages',
 '/home/wdkrnls/python/packages',
 '/home/wdkrnls/python/standalone',
 '/share/apps/python/Canopy/appdata/canopy-1.3.0.1715.rh5-x86_64/lib/python27.zip',
 '/share/apps/python/Canopy/appdata/canopy-1.3.0.1715.rh5-x86_64/lib/python2.7',
 '/share/apps/python/Canopy/appdata/canopy-1.3.0.1715.rh5-x86_64/lib/python2.7/plat-linux2',
 '/share/apps/python/Canopy/appdata/canopy-1.3.0.1715.rh5-x86_64/lib/python2.7/lib-tk',
 '/share/apps/python/Canopy/appdata/canopy-1.3.0.1715.rh5-x86_64/lib/python2.7/lib-old',
 '/share/apps/python/Canopy/appdata/canopy-1.3.0.1715.rh5-x86_64/lib/python2.7/lib-dynload',
 '/home/wdkrnls/python/env/local/lib/python2.7/site-packages',
 '/home/ipython/Enthought2/lib/python2.7/site-packages/PIL',
 '/home/ipython/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/PIL',
 '/share/apps/python/Canopy/appdata/canopy-1.3.0.1715.rh5-x86_64/lib/python2.7/site-packages/IPython/extensions',
 '/home/wdkrnls/python/packages',
 '/home/wdkrnls/python/standalone']

我应该如何维护 sys.path？我需要所有这些 .egg 文件来分发 Canopy 吗？

Answer 1

看起来你正在使用 ipython。如果你没有在 virtualenv 中安装 ipython，正在运行的 ipython 可执行文件将是系统的。

要检查，请比较 which ipython 和 which python。 Python 可执行文件应该是 virtualenv 中的那个。如果打赌 ipython 可执行文件是系统文件。