202_Happy_Number_v2.py

class Solution(object):
    def isHappy(self, n):
        """
        :type n: int
        :rtype: bool
        """

        def rec_happy(n, ary_temp):
            sz= str(n)
            sum= 0
            for e in sz:
                sum+=int(e)**2
            if(sum==1):
                return True
            else:
                if(sum not in ary_temp):
                    ary_temp.append(sum)
                    return rec_happy(sum, ary_temp)
                else:
                    return False
        return rec_happy(n, [])