以编程方式获取当前的 IPython 笔记本单元输出? [英] Programmatically get current IPython notebook cell output?

问题描述

我有一个在 IPython 笔记本(输入单元 X)中运行的导入函数，它产生一个输出(在输出单元 X 中).函数运行后，我还有一些代码(也在输入单元格 X 中)；该代码有没有办法检索当前输出(在输出单元格 X 中)?

I have an imported function that runs in an IPython notebook (input cell X) which produces an output (in output cell X). After the function runs, I have some more code (also in input cell X); is there any way for that code to retrieve the current output (in output cell X)?

可能还有其他方法可以完成我想要实现的目标；但我很好奇上述是否可行.

There may be other ways to do what I am trying to achieve; but I am curious if the above is possible.

推荐答案

IPython 的 输出缓存系统定义了几个全局变量:

IPython's output caching system defines several global variables:

• [_](单下划线):存储之前的输出，就像 Python 的默认解释器一样.
• [__](两个下划线):下一个上一个.
• [___](三个下划线):next-next previous.

• [_] (a single underscore): stores previous output, like Python’s default interpreter.
• [__] (two underscores): next previous.
• [___] (three underscores): next-next previous.

此外，在创建每个输出 x 之后，会创建一个变量 _，以输出作为其值.例如:

Additionally, after each output x is created, there is a variable _<x> created with the output as its value. For example:

In [12]: lst = [i for i in range(11)]

In [13]: lst
Out[13]: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

In [14]: _13
Out[14]: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

另外，如果你有兴趣，_i 包含输入单元格 x 的内容:

Also, if you're interested, _i<x> contains the contents of the input cell x:

In [15]: _i12
Out[15]: 'lst = [i for i in range(11)]'

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