IPython - 使用自定义魔术导入/填充命名空间 [英] IPython - importing/populating namespace with custom magic

问题描述

IPython中的％pylab 魔法将一堆函数导入用户的工作区，这非常方便。看看这些代码，完成这项工作并不是很明显。到目前为止，我的启动文件夹中有一个神奇的功能：

The %pylab magic in IPython imports a bunch of functions into the user's workspace, which is very convenient. Looking at the code, it's not at all obvious how this is done. What I have so far is a magic function in my startup folder:

from IPython.core.magic import register_line_magic

@register_line_magic
def import_my_functions(line):
    """
    Import functions into namespace somehow....
    e.g. import numpy as np
    """

然后应该可以：

In[1]: %import_my_functions
 imported the following:
   numpy as np
   .....
In[2]: np
Out[2]: <module 'numpy' from ..../venv/lib/python2.7/site-packages/numpy/__init__.pyc'>

如果该命令还重新加载已更改的模块，则会获得奖励。

Bonus would be if the command also reloads changed modules.

推荐答案

建议1：不要使用％pylab 。

建议2：不要试图模仿pylab使用它会咬你

Advice 2: don't try to imitate pylab usage it will bite you

如果你想拥有方便导入创建自己的包并从mypackage导入 *

If you want to have convenient import create your own package and do from mypackage import *

如果你真的想要一个有权访问的魔法你应该看到python命名空间这个问题。并添加 @needs_local_scope 装饰器。

If you really want a magic that have access to python namespace you should see this question. and add the @needs_local_scope decorator.

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