如何通过Python 3中作为命令行参数提供的转义序列拆分UTF-8字符串？

I'm trying to seperate UTF-8 strings by a delimiter provided as command line argument in Python3. The TAB character "\t" should be a valid option. Unfortunately I didn't find any solution to interpret an escape sequence as such. I wrote a little test script called "test.py"I'm trying to seperate UTF-8 strings by a delim