[英]Custom Python shell for Emacs python-mode
What does it take to replace regular /usr/bin/python with a custom python shell in Emacs' python-mode?在 Emacs 的 python 模式下用自定义 python shell 替换常规 /usr/bin/python 需要什么?
Basically I have a binary /usr/bin/mypython which does some initializations before starting python interpreter prompt, and for all interaction purposes, the resulting interpreter shell is equivalent to /usr/bin/python.基本上我有一个二进制 /usr/bin/mypython 在启动 python 解释器提示之前进行一些初始化,并且出于所有交互目的,生成的解释器 shell 等效于 /usr/bin/python。
However, if I specify this binary in "python-python-command" (using python.el in Emacs 23.3), I get "Only Python versions >=2.2 and < 3.0 are supported"但是,如果我在“python-python-command”中指定此二进制文件(在 Emacs 23.3 中使用 python.el),我会得到“仅支持 Python 版本 >=2.”。
I'm about to read the elisp to check, but I'd bet if you added a --version
flag that gave the save results as /usr/bin/python
, emacs would be happy.我即将阅读 elisp 进行检查,但我敢打赌,如果您添加了一个
--version
标志,将保存结果显示为/usr/bin/python
,emacs 会很高兴。
Update更新
Here's the code in python.el line 1555 et seq in EMACS 23.3.1:这是 EMACS 23.3.1 中 python.el 第 1555 行等中的代码:
(defvar python-version-checked nil)
(defun python-check-version (cmd)
"Check that CMD runs a suitable version of Python."
;; Fixme: Check on Jython.
(unless (or python-version-checked
(equal 0 (string-match (regexp-quote python-python-command)
cmd)))
(unless (shell-command-to-string cmd)
(error "Can't run Python command `%s'" cmd))
(let* ((res (shell-command-to-string
(concat cmd
" -c \"from sys import version_info;\
print version_info >= (2, 2) and version_info < (3, 0)\""))))
(unless (string-match "True" res)
(error "Only Python versions >= 2.2 and < 3.0 are supported")))
(setq python-version-checked t)))
What it's doing is running a one-liner它正在做的是运行单线
from sys import version_info;
print version_info >= (2, 2) and version_info < (3, 0)
that just prints "True" or "False".只打印“True”或“False”。 Fix your script to handle the -c flag and you should be fine.
修复你的脚本来处理 -c 标志,你应该没问题。
Alternatively, you could take the hacker's way out and force the value of python-version-checked
to t
, and it'll never do the check.或者,您可以采取黑客的出路并将
python-version-checked
的值强制为t
,它永远不会进行检查。
The easiest way to defeat the check is to lie and tell python-check-version
that it's already checked:击败检查的最简单方法是撒谎并告诉
python-check-version
它已经检查过:
(setq python-version-checked t)
with python-mode.el just do使用 python-mode.el 就可以了
Mx MY-PYTHON RET Mx MY-Python RET
given the Python version is installed鉴于已安装 Python 版本
https://launchpad.net/python-mode https://launchpad.net/python-mode
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