1、将一个字符串反转并输出
s='python'
print(s[::-1])
输出结果：nohtyp
2、将一句话反转并输出
import re
s1='hello world!'
print(re.split(r'\s',s3)) #输出的时候不保留空格
print(re.split(r'(\s+)',s3)) #输出的时候保留空格
##################################################
s2='<Welcome to EF.com!>'
print(re.split(r'\s+',s1))
print(re.split(r'(\w+)',s1))
print(re.split(r'(\s+|\w+)',s1))
print(''.join(re.split(r'(\s+|\w+)',s1)[::-1]))
##################################################
s3='The best quality and design is just for you'
print(''.join(reversed(re.split(r'(\s+|\w+)',s2))))
s3输出结果：you for just is design and quality best The
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