python - 如何在python中转换以下字符串？

Question

输入:用户名/联系人号码

输出:用户ID/联系电话

我试过下面的代码:

s ="UserID/ContactNumber"

list = [x for x in s]

for char in list:

     if char != list[0] and char.isupper():
            list[list.index(char)] = '-' + char

 fin_list=''.join((list))
 print(fin_list.lower())

但我得到的输出是:

  user-i-d/-contact-number

Answer 1

你可以使用 regular expression具有积极的后视断言:

>>> import re
>>> s  ="UserID/ContactNumber"
>>> re.sub('(?<=[a-z])([A-Z])', r'-\1', s).lower()
'user-id/contact-number'