为什么这样写是错误的呀？
months = set([1,2,3,4,5,6,7,8,9,10,11,12)
x1 = 1
x2 = 'sun'
if x1 in months:
print 'x1: ok'
else:
print 'x1: error'
if x2 in months:
print 'x2: ok'
else:
print 'x2: error'
慕用4501092
2016-11-10
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