python序列中是否包含某个元素
http://outofmemory.cn/code-snippet/9098/python-list-contains-with-in-not-in
theList = ['a','b','c']
if 'a' in theList:
print 'a in the list'
if 'd' not in theList:
print 'd is not in the list'http://outofmemory.cn/code-snippet/9098/python-list-contains-with-in-not-in
theList = ['a','b','c']
if 'a' in theList:
print 'a in the list'
if 'd' not in theList:
print 'd is not in the list'