- os.extsep is the extension separator (always '.')
- os.altsep is the alternate pathname separator (None or '/')
- os.pathsep is the component separator used in $PATH etc
- - os.linesep is the line separator in text files ('\r' or '\n' or '\r\n')
+ - os.linesep is the line separator in text files ('\n' or '\r\n')
- os.defpath is the default search path for executables
- os.devnull is the file path of the null device ('/dev/null', etc.)