def trim(s): l=len(s) if l==0: return s else: a=99 for i in range(l): if s[i]!=' ': a=i break for i in range(l): i=i+1 if s[-i]!=' ': b=l-i+1 break if a==99: return '' else: return s[a:b]
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福尔摩神经
def trim(s): l=len(s) if l==0: return s else:
a=99 for i in range(l): if s[i]!=' ': a=i break for i in range(l): i=i+1 if s[-i]!=' ': b=l-i+1 break if a==99: return '' else: return s[a:b]