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:
我有一个表示路径的字符串。由于此应用程序用于Windows，OSX和Linux，因此我们已定义环境变量以正确映射来自不同文件系统的卷。结果是：
"$C/test/testing"
What I want to do is evaluate the environment variables in the string so that they're replaced by their respective volume names. Is there a specific command I'm missing, or do I have to take os.environ.keys() and manually replace the strings?
我想要做的是评估字符串中的环境变量，以便它们被各自的卷名替换。是否存在我缺少的特定命令，或者我是否必须使用os.environ.keys（）并手动替换字符串？
1 个解决方案
#1
64
Use os.path.expandvars to expand the environment variables in the string, for example:
使用os.path.expandvars扩展字符串中的环境变量，例如：
>>> os.path.expandvars('$C/test/testing')
'/*/test/testing'
#1
64
Use os.path.expandvars to expand the environment variables in the string, for example:
使用os.path.expandvars扩展字符串中的环境变量，例如：
>>> os.path.expandvars('$C/test/testing')
'/*/test/testing'