Ipython 使用的是 python 3.5 而不是 2.7

Question

我最近将我的系统从 15.10 更新到 16.04，但现在我遇到了 ipython 使用的解释器的问题。

现在 ipython a ipython3 使用相同的版本 (3.5.1)

我尝试重新安装 ipython，但问题仍然存在。

以下是控制台报告的版本：

$ python
Python 2.7.11+ (default, Apr 17 2016, 14:00:29) 
[GCC 5.3.1 20160413] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 

 

$ python3
Python 3.5.1+ (default, Mar 30 2016, 22:46:26) 
[GCC 5.3.1 20160330] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 

 

$ ipython
Python 3.5.1+ (default, Mar 30 2016, 22:46:26) 
Type "copyright", "credits" or "license" for more information.

IPython 2.4.1 -- 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.

 

$ ipython3
Python 3.5.1+ (default, Mar 30 2016, 22:46:26) 
Type "copyright", "credits" or "license" for more information.

IPython 2.4.1 -- 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.

Answer 1

/usr/local/bin/ipython 的第一行是 "#!/usr/bin/python3" 我可以编辑该行以使用 python 而不是 python3 或者它就像运行一样简单：

python /usr/local/bin/ipython

Answer 2

我发现最好这样做：

which ipython

这显示了在您键入时运行的 ipython 文件的位置ipython。然后编辑它（我使用了 gedit:sudo gedit /usr/local/ipython或您从 获得的任何路径which ipython）。然后更改第一行以使用您想要的python 版本。例如，如果您想要 python3.5，请将第一行更改为#!/usr/bin/python3.5.