Python 和环境变量 [英] Python and environment variables

问题描述

在以下代码片段(旨在在 init.d 环境中工作)中，我想执行 test.ClassPath.但是，我在设置和传递用户的 .bashrc 中定义的 CLASSPATH 环境变量时遇到问题.

In the following code snippet (meant to work in an init.d environment) I would like to execute test.ClassPath. However, I'm having trouble setting and passing the CLASSPATH environment variable as defined in the user's .bashrc.

这是我沮丧的根源:

• 当以下脚本在使用模式下运行时，它会打印出 CLASSPATH OK(来自 $HOME/.bashrc)
• 当我以 root 身份运行它时，它也可以正常显示 CLASSPATH(我已经使用 CLASSPATH 设置了/etc/bash.bashrc)
• 但是，当我执行sudo script.py"(以模拟 init.d 启动时发生的情况)时，缺少 CLASSPATH ！！

CLASSPATH 非常大，所以我想从一个文件中读取它......比如 $HOME/.classpath

The CLASSPATH is quite large, so I'd like to read it from a file .. say $HOME/.classpath

#!/usr/bin/python
import subprocess
import os.path as osp
import os

user = "USERNAME"
logDir = "/home/USERNAME/temp/"
print os.environ["HOME"]

if "CLASSPATH" in os.environ:
        print os.environ["CLASSPATH"]
else:
        print "Missing CLASSPATH"
procLog = open(osp.join(logDir, 'test.log'), 'w')
cmdStr = 'sudo -u %s -i java  test.ClassPath'%(user, ) # run in user
proc = subprocess.Popen(cmdStr, shell=True, bufsize=0, stderr=procLog, stdout=procLog)
procLog.close()

推荐答案

您可以在启动 python 脚本之前放置 source ~/.bashrc 来设置环境变量.

You could put source ~/.bashrc before starting your python script to get the environment variables set.

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