def loadVectorIndexFromFile(dbfile):
    try:
        with open(dbfile, 'rb') as f:
            f.seek(HeaderInfoLength)
            vi_len = VectorIndexRows * VectorIndexCols * SegmentIndexSize
            vector_data = f.read(vi_len)
        return vector_data
    except IOError as err:
        print(repr(err))

def loadContentFromFile(dbfile):
    try:
        with open(dbfile, "rb") as f:
            all_data = f.read()
        return all_data
    except IOError as err:
        print(repr(err))

import ipaddress

def isip(self, ip):
    try:
        ipaddress.IPv4Address(ip)
        return True
    except ipaddress.AddressValueError:
        return False