Jupyter:我该如何回忆和编辑以前的"In:"文本? [英] Jupyter: How do I recall and edit the previous "In:" text?

问题描述

在命令行Python会话中，我可以按Control-P来检索先前输入的行，对其进行编辑.

In a command line Python session I can press Control-P to retrieve the previously entered line edit it.

如何在Jupyter中执行类似的操作，即结转前一个"In:"块中的内容?

How can I perform a similar operation in Jupyter, i.e. carry forward the contents of the previous "In:" block?

推荐答案

看起来Jupyter没有开箱即用的功能，尽管您可以使用CodeMirror API编写自己的自定义键盘快捷键: https://codemirror.net/doc/manual.html

Looks like Jupyter doesn't have such a feature out of the box, although, you could write your own custom keyboard shortcut using CodeMirror API: https://codemirror.net/doc/manual.html

首先，您需要创建自己的custom.js文件: http://jupyter-notebook .readthedocs.io/en/stable/examples/Notebook/JavaScript％20Notebook％20Extensions.html#custom.js

First you need to create your own custom.js file: http://jupyter-notebook.readthedocs.io/en/stable/examples/Notebook/JavaScript%20Notebook%20Extensions.html#custom.js

您可以尝试这样的操作(取决于您期望得到的结果):

You could try something like this (depending on what you're expecting to get):

CodeMirror.keyMap.pcDefault["Ctrl-P"] = function(cm) {

    var selected = Jupyter.notebook.get_selected_cell();
    if (!Jupyter.notebook.get_prev_cell(selected)) {
        // This is the first cell
        return;
    }

    Jupyter.notebook.select_prev();
    Jupyter.notebook.copy_cell();
    Jupyter.notebook.select_next();
    Jupyter.notebook.paste_cell_replace();
    Jupyter.notebook.handle_edit_mode(selected);

}

这将复制上面单元格的内容，并将其插入到当前选定的单元格中.您可以将paste_cell_replace()方法替换为paste_cell_above()来创建一个新的单元格，而不是替换当前所选单元格的内容.

This will copy the contents of the cell above and insert it into the currently selected cell. You could replace paste_cell_replace() method with paste_cell_above() to create a new cell instead of replacing the contents of the currently selected one.

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