[英]How to read history in ptpython console?
I've been trying to figure out how to get save and read in the history of my Python commands in a ptpython
console, but haven't been able to do so.我一直在试图弄清楚如何在ptpython
控制台中保存和读取我的 Python 命令的历史记录,但一直没能做到。 All of my efforts have so far been variations of this answer .到目前为止,我所有的努力都是这个答案的变体。 However, I still am not able to read in my history.但是,我仍然无法阅读我的历史。
I would simply like to be able to press the ↑ and ↓ arrows to go through my Python commands from a previous console session ( not the current console session that I'm in).我只是希望能够按↑和↓箭头从以前的控制台会话(不是我所在的当前控制台会话)中浏览我的 Python 命令。 Here's what I currently have in my $PYTHONSTARTUP
file:这是我目前在$PYTHONSTARTUP
文件中的内容:
# 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=/home/user/.pystartup" in bash.
#
# Note that PYTHONSTARTUP does *not* expand "~", so you have to put in the
# full path to your home directory.
import atexit
import os
import readline
import rlcompleter
import sys
try:
from ptpython.repl import embed
except ImportError:
print('ptpython is not available: falling back to standard prompt')
else:
sys.exit(embed(globals(), locals()))
historyPath = os.path.expanduser("~/.ptpython/history")
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)
readline.parse_and_bind('tab: complete')
del os, atexit, readline, rlcompleter, save_history, historyPath
And my $PYTHONSTARTUP
variable is:我的$PYTHONSTARTUP
变量是:
$ echo $PYTHONSTARTUP
/Users/[redacted]/.pystartup
I'm on Python 3.7.3, macOS 10.14.6, and ptpython 2.0.4.我使用的是 Python 3.7.3、macOS 10.14.6 和 ptpython 2.0.4。
Thanks谢谢
If you check source code for embed then you see option history_filename=
如果您检查嵌入的源代码,那么您会看到选项history_filename=
embed(globals(), locals(), history_filename=historyPath)
import os
try:
from ptpython.repl import embed
except ImportError:
print('ptpython is not available: falling back to standard prompt')
else:
history_path = os.path.expanduser("~/.ptpython/history")
embed(globals(), locals(), history_filename=history_path)
BTW: If folder ~/.ptpython
doesn't exists then you will have to create it before run code.顺便说一句:如果文件夹~/.ptpython
不存在,那么您必须在运行代码之前创建它。
EDIT (2022):编辑(2022):
import os
try:
from ptpython.repl import embed
except ImportError:
print('ptpython is not available: falling back to standard prompt')
else:
history_dir = os.path.expanduser("~/.ptpython")
history_path = os.path.join(history_dir, "history")
if not os.path.exists(history_path):
os.makedirs(history_dir, exist_ok=True) # create folder if not exist
open(history_path, 'a').close() # create empty file
embed(globals(), locals(), history_filename=history_path)
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