LeetCode_35 Contains Duplicate

题目描述:

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Given an array of integers, find if the array contains any duplicates.
Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct.

输入样例:

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Input: [1,2,3,1]
Output: true
Input: [1,2,3,4]
Output: false
Input: [1,1,1,3,3,4,3,2,4,2]
Output: true

Code:

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def containsDuplicate(self, nums):
return len(nums) != len(set(nums))