leetcode1291

 1 class Solution:
 2     def sequentialDigits(self, low: int, high: int) -> ‘List[int]‘:
 3         lists = [‘1‘,‘2‘,‘3‘,‘4‘,‘5‘,‘6‘,‘7‘,‘8‘,‘9‘]
 4         res = []
 5         for i in range(9):
 6             for length in range(1,10):
 7                 j = i + length
 8                 sub = ‘‘.join(lists[i:j])
 9                 integer = int(sub)
10                 if integer >= low and integer <= high:
11                     res.append(integer)
12                 elif integer > high:
13                     break
14                 if j >= 9:
15                     break
16         res.sort()
17         return res