Question

我在Mac上运行OS X！0.10 Yosemite。 Python＆amp;的默认版本Django是2.7＆amp; 1.5。我想建立一个拥有Django 1.8的virtualenv，所以我正在做以下事情：

$ virtualenv --no-site-packages django18env
New python executable in django18env/bin/python2.7
Also creating executable in django18env/bin/python
Installing setuptools, pip...done.
$ source django18env/bin/activate
(django18env)$

然后我正在安装Django 1.8

(django18env)$ sudo pip install django==1.8
Password:
Downloading/unpacking django==1.8
  Downloading Django-1.8-py2.py3-none-any.whl (6.2MB): 6.2MB downloaded
Installing collected packages: django
Successfully installed django
Cleaning up...
(django18env)$

一旦运行，我在django18env / lib / python2.7 / site-packages / django下安装了Django

如果我查看该目录中的__init__.py文件，它会显示：

来自django.utils.version导入get_version VERSION =（1,8,8，'final'，0）

所以看起来肯定在virtualenv目录中安装了正确的版本。但是，如果我使用django-admin --version，我会得到：

(django18env)$ django-admin version
1.5.4

我也尝试在虚拟环境中启动python并以这种方式获取django版本：

(django18env)$ python
Python 2.7.8 (default, Jul 29 2014, 21:50:48) 
[GCC 4.2.1 Compatible Apple LLVM 5.1 (clang-503.0.40)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import django
>>> django.get_version()
'1.5.4'
>>>

在vertualenv中安装1.8时，为什么它似乎仍然指向1.5的任何想法？

我在这里阅读了各种其他线程，但无法将版本指向1.8

任何帮助非常感谢

由于

Answer 1

不要在virtualenv上使用sudo。 vitualenv的重点是，安装软件不是系统范围的，但确实适用于该环境。但无论是在virtualenv内部还是在其外部，如果您使用sudo，它都会在全局范围内为您的系统安装软件。

ziya@ziya:~/Desktop/coursera/python/lorem$ virtualenv ipsum
New python executable in ipsum/bin/python2.6
Also creating executable in ipsum/bin/python
Installing setuptools, pip...done.
#created a virtualenv
ziya@ziya:~/Desktop/coursera/python/lorem$ cd ipsum/
ziya@ziya:~/Desktop/coursera/python/lorem/ipsum$ . bin/activate
# will now install package with sudo 
(ipsum)ziya@ziya:~/Desktop/coursera/python/lorem/ipsum$ sudo pip install sudokulib # i don't know what it is, just installing.
[sudo] password for ziya: 
.....
Collecting sudokulib
/usr/local/lib/python2.7/dist-packages # attention to this path!
...
Successfully installed sudokulib-0.6a0
(ipsum)ziya@ziya:~/Desktop/coursera/python/lorem/ipsum$ python
Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41) 
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sudokulib # import the newly installed module
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named sudokulib
>>> exit()
(ipsum)ziya@ziya:~/Desktop/coursera/python/lorem/ipsum$ deactivate
#deactivating virtualenv and starting default python
ziya@ziya:~/Desktop/coursera/python/lorem/ipsum$ python
Python 2.7.3 (default, Dec 18 2014, 19:10:20) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sudokulib
>>> sudokulib.__version__
'0.6a' #here it is!
>>> exit()
ziya@ziya:~/Desktop/coursera/python/lorem/ipsum$ . bin/activate
(ipsum)ziya@ziya:~/Desktop/coursera/python/lorem/ipsum$ pip install sudokulib #now installing the same module without sudo
Collecting sudokulib
  Downloading sudokulib-0.6a.tar.gz
    /home/ziya/Desktop/coursera/python/lorem/ipsum/lib/python2.6/site-packages
.... 
Successfully installed sudokulib-0.6a0
(ipsum)ziya@ziya:~/Desktop/coursera/python/lorem/ipsum$ python
Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41) 
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sudokulib
>>> sudokulib.__version__
'0.6a' #seems ok now :)
>>>

Answer 2

我发现了这个问题。正如我上面所说，Django 1.8正在virtualenv中安装好但是Python没有使用它。在vitualenv我开始使用Python然后：

>>>import django
>>>django.__file__

这表明Django是从以下位置导入的： /usr/local/Cellar/python/2.7.8/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages

当我查看我的.bash_profile时，有一条线：

export PYTHONPATH=$PYTHONPATH:/usr/local/Cellar/python/2.7.8/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages

不知道怎么/什么时候进去，但我评论了它，重新启动了shell，现在我的virtualenv中的Django1.8和virtualenv之外的旧版（默认版）1.5。

感谢您的帮助和建议

在virtualenv

2 个答案: