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ipython: change PageDown/PageUp to move back/forward through command history – Debian

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.

But in ipython, these shortcuts are reversed.

Where are these shortcuts defined for ipython, and how can I reverse them back, so that

PageDown goes back in history, and PageUp goes forward in history?

I am using ipython3 version 5.8.0 on Debian 10.

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2

Answers


  1. 0

    In IPython version 5.x, this is mentioned in the documentation: Specific config details — IPython 5.11.0.dev documentation

    To get the function to bind to, see key_binding/bindings/basic.py: The default is

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

    So, put this code in a startup file:

    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"))

    On newer IPython versions (such as 7.19.0) replace the registry = ... line with

    registry = get_ipython().pt_app.key_bindings

    Reference: Specific config details — IPython 7.19.0 documentation

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  2. 0

    Create script in ~/.ipython/profile_default/startup directory with any name ending with extension .py or .ipy

    For example i created history_keybindings.py and put it inside ~/.ipython/profile_default/startup directory

    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)

    Note: For more info check here

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