<LeetCode><Easy> 217 ContainsDuplicate

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.

# Python2  48ms

class Solution(object):
def containsDuplicate(self, nums):
"""
:type nums: List[int]
:rtype: bool
"""
nDict={} #dict is Disdinct
for n in nums:
if n in nDict:
return True
else:nDict
=0
return False