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Closed 11 years ago.

I have to write a function which returns True or False depengin on a list. For example list_a =[1,2,3,4,4] it should return False and if list_a=[1,2,3,4] it should return True.

谁能帮助?

Answer 1

def has_dups(l): 
    return len(set(l)) < len(l)

Answer 2

利用一套装置。这些顺序只是具有独特内容的顺序。

def hasNoDuplicates ( lst ):
    return len( lst ) == len( set( lst ) )

>>> hasNoDuplicates( [1,2,3,4,4] )
False
>>> hasNoDuplicates( [1,2,3,4] )
True

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