自定义IPython提示符

《自定义IPython提示符》 IPython.png

默认情况下,IPython的默认提示符格式是如下:

$ ipython
Python 3.6.1 (default, Apr  6 2017, 11:37:13)
Type 'copyright', 'credits' or 'license' for more information
IPython 6.2.1 -- An enhanced Interactive Python. Type '?' for help.

In [1]: import numpy as np

In [2]: a = np.arange(15).reshape(3, 5)

In [3]: a
Out[3]:
array([[ 0,  1,  2,  3,  4],
       [ 5,  6,  7,  8,  9],
       [10, 11, 12, 13, 14]])

In [1]: 加上行号的格式。输出代码也是同样的格式Out[3]:

有的时候我们在写测试代码,希望把它复制到博客里面的时候,这种格式看起来就不那么美观,更希望它是Python的默认提示符>>>风格。

$ python
Python 3.6.1 (default, Apr  6 2017, 11:37:13)
[GCC 4.2.1 Compatible Apple LLVM 8.1.0 (clang-802.0.38)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import numpy as np
>>> a = np.arange(15).reshape(3, 5)
>>> a
array([[ 0,  1,  2,  3,  4],
       [ 5,  6,  7,  8,  9],
       [10, 11, 12, 13, 14]])

那我们该如何配置呢? 具体操作如下(文末更新有最简单的方式):

首先创建IPython的自定义配置文件

$ ipython profile create
[ProfileCreate] Generating default config file: '~/.ipython/profile_default/ipython_config.py'
[ProfileCreate] Generating default config file: '~/.ipython/profile_default/ipython_kernel_config.py'

可以看到在HOME目录下: 多了两个配置文件

我们修改~/.ipython/profile_default/ipython_config.py文件, 在文件的最底部,
加入如下代码:

$ tail -n 12 ~/.ipython/profile_default/ipython_config.py

from IPython.terminal.prompts import Prompts, Token
import os

class MyPrompt(Prompts):
    def in_prompt_tokens(self, cli=None):
        return [(Token.Prompt, '>>> ')]

    def out_prompt_tokens(self):
       return []

c.TerminalInteractiveShell.prompts_class = MyPrompt

重新打开IPython, 实现效果如下:

$ ipython
Python 3.6.1 (default, Apr  6 2017, 11:37:13)
Type 'copyright', 'credits' or 'license' for more information
IPython 6.2.1 -- An enhanced Interactive Python. Type '?' for help.

>>> import numpy as np

>>> a = np.arange(15).reshape(3, 5)

>>> a
array([[ 0,  1,  2,  3,  4],
       [ 5,  6,  7,  8,  9],
       [10, 11, 12, 13, 14]])

参考:

http://ipython.readthedocs.io/en/stable/config/details.html#custom-prompts

更新

在看了Ipython的代码IPython/terminal/prompts.py时,发现它已经定义好了经典提示符的风格ClassicPrompts。不需要我们再自定义实现了,直接在配置文件~/.ipython/profile_default/ipython_config.py里配置使用它即可

c.TerminalInteractiveShell.prompts_class = 'IPython.terminal.prompts.ClassicPrompts'
    原文作者:宁静的夜
    原文地址: https://www.jianshu.com/p/bab89ef30370
    本文转自网络文章,转载此文章仅为分享知识,如有侵权,请联系博主进行删除。
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