问题描述:将一句话的单词进行倒置,标点不倒置。比如 I like beijing. 经过函数后变为:beijing. like I
代码:
def rev1(s): return ' '.join(reversed(s.split()))
def rev2(s): t = s.split() t.reverse() return ' '.join(t)
def rev3(s): '''考虑开头或结束有空格的情况''' import re t = re.split('\s+', s.strip()) t.reverse() return ' '.join(t)
def rev4(s): '''考虑开头或结束有空格的情况''' import re t = re.split('\s+', s.strip()) return ' '.join(reversed(t))
def rev5(s): '''字符串整体逆序,分隔,再各单词逆序''' t = ''.join(reversed(s)).split() t = map(lambda x:''.join(reversed(x)), t) return ' '.join(t)
#测试
import string import random
source = string.ascii_letters + ' ,.?' for i in range(100000): s = ''.join((random.choice(source) for _ in range(100))) s1, s2, s3, s4,s5 = rev1(s), rev2(s), rev3(s), rev4(s), rev5(s) if not (s1==s2==s3==s4==s5): print('='*30) print('{0}\n{1}\n{2}\n{3}\n{4}\n{5}'.format(s,s1,s2,s3,s4,s5))
运行结果:
无输出,说明几种方法处理结果一致。