Leetcode Question 217 'Contains Duplicate' in Python

Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct.



Example 1:

Input: nums = [1,2,3,1]
Output: true
Example 2:

Input: nums = [1,2,3,4]
Output: false
Example 3:

Input: nums = [1,1,1,3,3,4,3,2,4,2]
Output: true