LC165 Compare Version Numbers

class Solution:
    def compareVersion(self, version1: str, version2: str) -> int:
        """
        step1: split '.' out of str and convert each segment  into integer to remove leading 0 s and then save them to []
        step2: find max length of the two lists. start loop each list 
        step3: get current segment value, check if i out of current list's boundry, if yes, assign a 0 else assign v[i]
        step4: compare vv1, vv2, if vv1 > vv2 return 1; if vv1 < vv2 return -1 
        step5: if whole loop finished, there is no conclusion for bigger number  between v1,v2. means they'r equal, return 0 
        time O(N) space O(N) if we need to recreate new list to store processed lists.
        """
        v1 = [int(v) for v in version1.split('.')]
        v2 = [int(v) for v in version2.split('.')]
        l1 = len(v1)
        l2 = len(v2)
        for i in range(max(l1,l2)):
            vv1 = v1[i] if i < l1 else 0
            vv2 = v2[i] if i < l2 else 0
            if vv1 > vv2:
                return 1
            elif vv1 < vv2:
                return -1
        return 0