Python Log File Creation Classes

import time, datetime

class string(object):

    def removeChars(self, string, charArray):

        for i in range (0, len(charArray)):
            string = string.replace(charArray[i], "")

        return string

class log(object):

    def fileOpen(self, file):

        self.file = open(file,"a")

    def addLine(self, line):

        self.file.write(str(line) + "\n")

    def addLineDT(self, line):

        time = datetime.datetime.now()
        print(time)
        self.addLine(str(time) + str(line))

    def addLinePrint(self, line):

        self.file.write(str(line) + "\n")
        print(line)

    def fileClose(self):

        self.file.close()