为Python终端提供持久的历史记录 [英] Give the Python Terminal a Persistent History

问题描述

有没有办法告诉交互式Python shell在会话之间保留其已执行命令的历史?

Is there a way to tell the interactive Python shell to preserve its history of executed commands between sessions?

在运行会话的同时，执行完命令后，我可以向上箭头访问这些命令，我​​只是想知道是否存在某种方式可以保存一定数量的这些命令，直到下次使用Python外壳程序.

While a session is running, after commands have been executed, I can arrow up and access said commands, I'm just wondering if there is some way for a certain number of these commands to be saved until the next time I use the Python shell.

这将非常有用，因为我发现自己在上次会话结束时使用的会话中重用命令.

This would be very useful since I find myself reusing commands in a session, that I used at the end of the last session.

推荐答案

可以，只需一个小的启动脚本即可.来自python教程中的交互式输入编辑和历史记录替换:

Sure you can, with a small startup script. From Interactive Input Editing and History Substitution in the python tutorial:

# Add auto-completion and a stored history file of commands to your Python
# interactive interpreter. Requires Python 2.0+, readline. Autocomplete is
# bound to the Esc key by default (you can change it - see readline docs).
#
# Store the file in ~/.pystartup, and set an environment variable to point
# to it:  "export PYTHONSTARTUP=~/.pystartup" in bash.

import atexit
import os
import readline
import rlcompleter

historyPath = os.path.expanduser("~/.pyhistory")

def save_history(historyPath=historyPath):
    import readline
    readline.write_history_file(historyPath)

if os.path.exists(historyPath):
    readline.read_history_file(historyPath)

atexit.register(save_history)
del os, atexit, readline, rlcompleter, save_history, historyPath

从Python 3.4开始，交互式解释器支持自动补全和历史记录功能盒子:

From Python 3.4 onwards, the interactive interpreter supports autocompletion and history out of the box:

现在，在支持readline的系统上，交互式解释器中默认启用了 Tab-completion.默认情况下，历史记录也处于启用状态，并且被写入(和读取)文件~/.python-history.

Tab-completion is now enabled by default in the interactive interpreter on systems that support readline. History is also enabled by default, and is written to (and read from) the file ~/.python-history.

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