ipython：更改 PageDown/PageUp 以通過命令歷史記錄向后/向前移動

Question

In my shell ( zsh ) or in python , I can go backward through command history by pressing PageDown , and I can go forward by pressing PageUp .

但是在ipython中，這些快捷方式是相反的。

這些為ipython定義的快捷方式在哪里，我怎樣才能將它們反轉回來，以便

PageDown回溯歷史， PageUp歷史前進？

我在 Debian 10 上使用ipython3版本5.8.0 。

Answer 1

在 IPython 版本 5.x 中，文檔中提到了這一點： 特定配置詳細信息 — IPython 5.11.0.dev 文檔

要獲取要綁定的 function，請參見key_binding/bindings/basic.py ：默認為

handle("pageup", filter=~has_selection)(get_by_name("previous-history"))
handle("pagedown", filter=~has_selection)(get_by_name("next-history"))

因此，將此代碼放在啟動文件中：

from IPython import get_ipython
from prompt_toolkit.filters import HasSelection
from prompt_toolkit.keys import Keys
from prompt_toolkit.key_binding.bindings.named_commands import get_by_name

registry = get_ipython().pt_cli.application.key_bindings_registry
registry.add_binding(Keys.PageUp, filter=~HasSelection())(get_by_name("next-history"))
registry.add_binding(Keys.PageDown, filter=~HasSelection())(get_by_name("previous-history"))

在較新的 IPython 版本（例如 7.19.0）上，將registry =...行替換為

registry = get_ipython().pt_app.key_bindings

參考： 具體配置細節 — IPython 7.19.0 文檔

Answer 2

在~/.ipython/profile_default/startup目錄中創建任何名稱以擴展名.py或.ipy結尾的腳本

例如，我創建了history_keybindings.py並將其放在~/.ipython/profile_default/startup目錄中

from IPython import get_ipython
from IPython.terminal.shortcuts import previous_history_or_previous_completion, next_history_or_next_completion
from prompt_toolkit.keys import Keys
from prompt_toolkit.filters import HasSelection

ip = get_ipython()

registry = None

if (getattr(ip, 'pt_app', None)):
   # for IPython versions 7.x
   registry = ip.pt_app.key_bindings
elif (getattr(ip, 'pt_cli', None)):
   # for IPython versions 5.x
   registry = ip.pt_cli.application.key_bindings_registry

if registry:
   registry.add_binding(Keys.PageUp, filter=(~HasSelection()))(previous_history_or_previous_completion)
   registry.add_binding(Keys.PageDown, filter=(~HasSelection()))(next_history_or_next_completion)

注意：有關更多信息，請查看此處