def trim(s): left = 0 right = 0 for c in s: if c == ' ': left += 1 else: break for i in range(len(s) - 1, left, -1): if s[i] == ' ': right -= 1 else: break res = '' if right == 0: res = s[left:] else: res = s[left:right] return res
Sign in to make a reply
提米冰冰