def trim(s):
n=len(s)
i=0
while i<=n-1:
if s[i]==' ':
i=i+1
else:
break
j=n-1
if j>=0:
while j:
if s[j]==' ':
j=j-1
s=s[i:j+1]
return s
Sign in to make a reply
怀玉
def trim(s):
n=len(s)
i=0
while i<=n-1:
if s[i]==' ':
i=i+1
else:
break
j=n-1
if j>=0:
while j:
if s[j]==' ':
j=j-1
else:
break
s=s[i:j+1]
return s