```
String = """bob
123 -- things
stuff after that line"""

```

I need to get " things".
I have tried

```
 def InBetween(Substring1, Substring2, String):
    return String[(String.index(Substring1)+len(Substring1)):String.index(Substring2)]
Stuff = InBetween("--", "\n", String)

```

But this gives me a ValueError due to the fact that it can not get any results
any way to do this?