将环境变量评估为字符串 [英] Evaluate environment variables into a string
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问题描述
$ C / test / testing
我想做的是评估字符串中的环境变量,以便它们被各自的卷名称替换。有没有一个特定的命令我缺少,或者我必须采取os.environ.keys()并手动替换字符串?
解决方案
使用 os.path.expandvars 展开字符串中的环境变量,例如:
>>> os.path.expandvars('$ C / test / testing')
'/ stackoverflow / test / testing'
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:
"$C/test/testing"
What I want to do is evaluate the environment variables in the string so that they're replaced by their respective volume names. Is there a specific command I'm missing, or do I have to take os.environ.keys() and manually replace the strings?
解决方案
Use os.path.expandvars to expand the environment variables in the string, for example:
>>> os.path.expandvars('$C/test/testing')
'/stackoverflow/test/testing'
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