python - 给 Python 终端一个持久的历史

Question

有没有办法告诉交互式 Python shell 保留 session 之间执行命令的历史记录？

在 session 运行时，在执行命令后，我可以向上箭头并访问所述命令，我只是想知道是否有某种方法可以保存一定数量的这些命令，直到我下次使用Python shell。

这将非常有用，因为我发现自己在 session 中重复使用了在上次 session 结束时使用的命令。

Answer 1

当然可以，只需一个小的启动脚本。来自 Interactive Input Editing and History Substitution在python教程中:

# 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，the interactive interpreter supports autocompletion and history out of the box :

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.