面试题58：题目2左旋转字符串

def leftRote(s,k):
    if not s:
        return ""
    s = [i for i in s]
    temp = s[:k]
    for i in range(k):
        del s[0]
    return ‘‘.join(s+temp)    

if __name__ == "__main__":
    s = ‘abcdefg‘
    k = 2
    print(leftRote(s,k))

# -*- coding:utf-8 -*-
class Solution:
    def LeftRotateString(self, s, n):
        # write code here
        #边界
        if not s:
            return ""
        
        slist = [i for i in s]
        temp = slist[:n]
        
        for i in range(n):
            del slist[0]
        res = slist+temp
        return ‘‘.join(res)