问题描述
我有一个表示路径的字符串.因为此应用程序在Windows,OSX和Linux上使用,所以我们定义了环境变量以正确映射来自不同文件系统的卷.结果是:
I have a string representing a path. Because this application is used on Windows, OSX and Linux, we've defined environment variables to properly map volumes from the different file systems. The result is:
"$C/test/testing"
我想做的是评估字符串中的环境变量,以便将它们替换为其各自的卷名.我是否缺少特定的命令,还是必须使用os.environ.keys()
并手动替换字符串?
What I want to do is evaluate the environment variables in the string so that they're replaced by their respective volume names. Is there a specific command I'm missing, or do I have to take os.environ.keys()
and manually replace the strings?
推荐答案
使用 os.path.expandvars 来扩展字符串中的环境变量,例如:
Use os.path.expandvars to expand the environment variables in the string, for example:
>>> os.path.expandvars('$C/test/testing')
'/stackoverflow/test/testing'
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