如果路径包含主目录波浪号〜，则不会执行Python子进程〜 [英] Python subprocess doesn't execute if the path contains home directory tilde ~

问题描述

我正在尝试检测错误并从Django应用程序重新启动服务器。
我正在使用以下代码：

I'm trying to detect an error and restart server from django application. I'm using the following code:

try:
 # do something
except:
 print('here')
 subprocess.call(['/home/my_username/restart.sh'])

restart.sh如下

restart.sh is as follows

#!/bin/sh
/home/my_username/webapps/app/apache2/bin/restart
/home/my_username/webapps/my_db/bin/cron

我正在使用webfaction作为托管服务提供商。
以上代码将打印语句，但不会重新启动服务器，也不会启动位于my_db下的mysql数据库。

I'm using webfaction as hosting provider. Aboved code prints statement, but doesn't restart the server and doesn't start mysql database which is under my_db.

也许我需要提供用户名/通过？

Maybe I need to supply username/pass? How to do that?

推荐答案

subprocess.call 不会将〜代字号扩展到您的主目录，因此它将在当前工作目录中查找名为〜的文件夹，然后从该目录开始寻找您的应用

The subprocess.call won't expand the ~ tilde character to your home directory, and therefore it'll look into your current working directory for a folder called ~ and then from there look for your app

您可以使用 os.path.expanduser 函数获取所需的行为，它是会是这样的：

You can use the os.path.expanduser function to get the desired behaviour, it'll be something like this:

try:
 # do something
except:
 print('here')
 subprocess.call([os.path.expanduser('~/webapps/app/apache2/bin/restart')])

此脚本将查找 / home / user / webapps / app / apache2 / bin / restart 并执行

祝你好运;）

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