regexp matching slug

Please help with slug regexp.

I would appreciate if the code will be given in python.

Conditions:

1 #valid 
1-1 #valid
1-1-1 #valid (infinite \d-\d)
开发者_StackOverflow中文版
1- #invalid
-1 #invalid
-1- #invalid

*NOTE 1 = \d

---

I would write it this way:

compiled = re.compile(r'\d(?:-\d)*$')
result = compiled.match(string_to_parse)

---

How about:

re.match(r'\d(?:-\d)*$', s)