利用切片操作去除字符串空格

def delSpace(s):
   s = list(s)
   start = 0
   end = 0
   for i in s:
       if i != " ":
           start = s.index(i)
           break
   for j in s[::-1]:
       if j !=" ":
           end = len(s)-s[::-1].index(j)
           break
   for j in s[::-1]:
       if j !=" ":
           end = len(s)-s[::-1].index(j)
           break
   return''.join(s[start:end])
s = "    I'm working    "
print(delSpace(s))