def trim(s):
n = 0
for i,in s:
if i != " ":
# print(n)
break
n += 1
m = 0
for y in reversed(s):
if y != " ":
# print(m)
m += 1
s = s[n:len(s)-m]
return s
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用户6177674467
def trim(s):
n = 0
for i,in s:
if i != " ":
# print(n)
break
n += 1
m = 0
for y in reversed(s):
if y != " ":
# print(m)
break
m += 1
s = s[n:len(s)-m]
return s