替换字符串中的环境变量
envsubst的Python项目详细描述
替换字符串中的环境变量:
>>> import os >>> from envsubst import envsubst >>> del os.environ['PS1'] >>> print(envsubst('$USER@$HOST ${PS1:-$}:')) ashafer01@github.com $: >>> os.environ['PS1'] = '' >>> print(envsubst('$USER@$HOST ${PS1:-$}:')) ashafer01@github.com $: >>> print(envsubst('$USER@$HOST ${PS1-foo}:')) ashafer01@github.com : >>> os.environ['DEFAULT_PROMPT'] = '$' >>> print(envsubst('$USER@$HOST ${PS1:-$DEFAULT_PROMPT}:'))
还支持来自argv的$0、$1等。