Special Array I — Python

# Time:  O(n)
# Space: O(1)

# array
class Solution(object):
    def isArraySpecial(self, nums):
        """
        :type nums: List[int]
        :rtype: bool
        """
        return all(nums[i]&1 != nums[i+1]&1 for i in xrange(len(nums)-1))