python列表-序列通用操作
序列之—通用操作判断元素是否在序列之内(x in s) (x not in s)>>> names = ['tom','jerry','mike','peter','john']>>> scores = [99,88,76.3,90.5,77]>>> 'meki' in namesFalse>>> 'mike' in namesTrue>>> 88 in scoresTrue>>