测试派 Give testers a home.

c='sdSdsfdAdsdsdfsfdsdASDSDFDSFa'
print(c.swapcase())
new_c=''
for i in c:
if i.islower():
i=chr(219-ord(i))
new_c += i
elif i.upper():
i=chr(155-ord(i))
new_c += i
print(new_c)

结果：
SDsDSFDaDSDSDFSFDSDasdsdfdsfA
hwHwhuwZwhwhwuhuwhwZHWHWUWHUz