Python/Java：如何反转字符串单词而不是特殊字符

Question

I have an input string with Special characters: input= "the: sky is sunny" expected output = "sunny: is sky the"

Need to reverse a string words but preserving special char in string.

I have done simple string reverse, but that did not preserve the special characters :( Please help how to do this ? Thanks in advance.

Answer 1

Use re :

s1 = 'the: sky is sunny'
fmt = re.sub(r'\w+', '{}', s1)
s2 = fmt.format(*reversed(re.findall(r'\w+', s1)))

>>> s2
'sunny: is sky the'

Regex: \\w+

\\w : matches any word character (equivalent to [a-zA-Z0-9_])

+ : matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)

Source: https://regex101.com/