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不愿吐露姓名的代聪

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   >>> print(sorted(students,key=lambda t:t[0])) #默认字母排序？
[('Adam', 92), ('Bart', 66), ('Bob', 75), ('Lisa', 88)] 
   >>> print(sorted(students,key=lambda t:t[1]))#默认数字排序
[('Bart', 66), ('Bob', 75), ('Lisa', 88), ('Adam', 92)]
   >>> print(sorted(students,key=itemgetter(1),reverse=True))#默认数字反过来排序
[('Adam', 92), ('Lisa', 88), ('Bob', 75), ('Bart', 66)]
>>> print(sorted(students,key=itemgetter(0),reverse=True))#默认字母反过来排序
[('Lisa', 88), ('Bob', 75), ('Bart', 66), ('Adam', 92)]
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