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Python 库未更新，除了 ipython

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Python 库未更新，除了 ipython

我曾经使用 pip 在装有旧版 Numpy 的计算机上更新并安装了一些库。但它似乎并没有真正应用：

davidm@illergard:~$ python
Python 2.7.3 (default, Feb 27 2014, 19:58:35) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy
>>> numpy.__version__
'1.6.1'

另一方面，Ipython 确实看到了新的库：

davidm@illergard:~$ ipython
Python 2.7.3 (default, Feb 27 2014, 19:58:35) 
Type "copyright", "credits" or "license" for more information.

IPython 2.1.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: import numpy

In [2]: numpy.__version__
Out[2]: '1.8.1'

这表明 Ipython 正在运行不同的 Python。让我们看看：

davidm@illergard:~$ which python
/usr/bin/python
davidm@illergard:~$ which ipython
/usr/local/bin/ipython

davidm@illergard:~$ cat /usr/local/bin/ipython
#!/usr/bin/python
# EASY-INSTALL-ENTRY-SCRIPT: 'ipython==2.1.0','console_scripts','ipython'
__requires__ = 'ipython==2.1.0'
import sys
from pkg_resources import load_entry_point

if __name__ == '__main__':
    sys.exit(
        load_entry_point('ipython==2.1.0', 'console_scripts', 'ipython')()
    )

shebang 对应的是同一个 Python！Virtualenv 没有安装，所以这不是问题。

系统信息：

davidm@illergard:~$ uname -a
Linux illergard 3.2.0-65-generic #99-Ubuntu SMP Fri Jul 4 21:03:29 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

davidm@illergard:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 12.04.4 LTS
Release:    12.04
Codename:   precise

有关的：https://stackoverflow.com/questions/9386048/ipython-reads-wrong-python-version

答案1

我不知道原因，如果有人能指出我会很高兴，但我找到了解决办法。运行

sudo python ez_setup.py

从ez_setup.py 在此处获取，奇迹般地解决了这个问题，现在 python 可以看到更新的库。无需重新安装。

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