'virtualenv''pip install sqlalchemy'但'pip list'无法看到 [英] 'virtualenv' 'pip install sqlalchemy' but 'pip list' can not see

问题描述

我学会了安装python的虚拟环境.

I learned to install a virtual environment of python.

似乎我不太熟悉一些基本的点子常识.

It seems I am not quite familiar some basic pip common sense.

也就是说，

在virtualenv中，

In the virtualenv,

virtualenv test

然后我有一个名为test的虚拟环境.

then I have a virtual environment which name is test.

然后我通过

source ./test/bin/activate

然后我进入虚拟环境

首先，我运行pip list检查软件包

firstly I run pip list to check the packages

pip list

然后我得到了"pip"和设置工具"

then I got 'pip' and 'setup tools'

然后我安装'sqlalchemy'

then I install 'sqlalchemy'

pip install sqlalchemy

我得到了信息成功安装了sqlachemy" 但是当我通过以下方式检查已安装的软件包时:

I got the information 'successfully installed sqlachemy' but when I check the installed packages by

pip list

我仍然只有'pip'和'setuptools'而没有'sqlalchemy'.

I still got only 'pip' and 'setuptools' without 'sqlalchemy'.

我想知道为什么会这样.

I am wondering why this happened.

"sqlalchemy"不是python软件包之一吗?

Is the 'sqlalchemy' not one of the python packages?

我已经检查了'./test/lib64/python2.7/dist-packages/'

And I have checked the './test/lib64/python2.7/dist-packages/'

我看到该目录下的'sqlalchemy'文件夹.

I saw the 'sqlalchemy' folder right under that directory.

有人告诉我为什么吗?

谢谢.

顺便说一句，我检查了'sys.path'变量，发现该值等于

by the way, I check the 'sys.path' variable, I found that the value is equal to

/home/worker/pyproject/testenv/local/lib64/python2.7/site-packages
/home/worker/pyproject/testenv/local/lib/python2.7/site-packages
/home/worker/pyproject/testenv/lib64/python2.7
/home/worker/pyproject/testenv/lib/python2.7
/home/worker/pyproject/testenv/lib64/python2.7/site-packages
/home/worker/pyproject/testenv/lib/python2.7/site-packages
/home/worker/pyproject/testenv/lib64/python2.7/lib-dynload
/home/worker/pyproject/testenv/local/lib/python2.7/dist-packages
/home/worker/pyproject/testenv/local/lib/python2.7/dist-packages
/home/worker/pyproject/testenv/lib/python2.7/dist-packages
/usr/lib64/python2.7
/usr/lib/python2.7

但是实际上，'sqlalchemy'安装在目录/home/worker/pyproject/testenv/lib64/python2.7/dist-packages/

But actually, the 'sqlalchemy' is installed in the directory /home/worker/pyproject/testenv/lib64/python2.7/dist-packages/

为什么"sys.path"不包含此内容 /home/worker/pyproject/testenv/lib64/python2.7/dist-packages/

Why 'sys.path' does not contain this /home/worker/pyproject/testenv/lib64/python2.7/dist-packages/

推荐答案

这是一个旧线程，但是我只是在一个过时的Centos机器上遇到了这个问题，解决方法是将VIRTUAL_ENV/lib64/pythonXX/dist-packages符号链接到VIRTUAL_ENV/lib/pythonXX/dist-packages.

This is an old thread, but I just ran into this on a dated Centos box and the fix was to symlink VIRTUAL_ENV/lib64/pythonXX/dist-packages to VIRTUAL_ENV/lib/pythonXX/dist-packages.

如果我理解正确，则在较旧版本的virtualenv中存在一个短暂的怪癖(不确定是错误).您也可以操纵sys.path，但我更愿意修复环境.

If I understand correctly, there was a shortlived quirk (not sure it was a bug) in an older version of virtualenv. You could also manipulate the sys.path but I would rather fix the environment if possible.

这篇关于'virtualenv''pip install sqlalchemy'但'pip list'无法看到的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！