Как читать файл построчно?

def getAnswer(self, question):
    f = self.openFileIfExists(self.storage)
    answer = False
 
    if f:
        for line in f:
            lineArr = line.split('=')
 
            if lineArr[1] == question:
                answer = lineArr[0]
                break
 
        f.close()
 
    return answer

for line in f:

for line in f:

def openFileIfExists(self, fileName):
 
    if os.path.exists(fileName) and os.path.isfile(fileName):
        try:
            f = open(fileName, 'a+', 1, 'UTF-8')
            return f
        except IOError:
            return False

import os
 
 
class Talker:
 
    storage = 'storage.txt'
 
    def talk(self):
        question = input()
 
        if question != 'End':
            self.answer(question)
            self.talk()
        else:
            exit(0)
 
    def answer(self, question):
        answer = self.getAnswer(question)
 
        if answer:
            print(answer)
        else:
            newAnswer = input('Я не знаю ответа: ')
            self.writeToStorage(question + '=' + newAnswer)
 
    def getAnswer(self, question):
        f = self.openFileIfExists(self.storage)
        answer = False
 
        if f:
            for line in f:
                lineArr = line.split('=')
 
                if lineArr[1] == question:
                    answer = lineArr[0]
                    break
 
            f.close()
 
        return answer
 
    def writeToStorage(self, data):
        f = self.openFileIfExists(self.storage)
 
        if f:
            pass
        else:
            f = open(self.storage, 'w')
        f.write(data + '\n')
 
    def openFileIfExists(self, fileName):
 
        if os.path.exists(fileName) and os.path.isfile(fileName):
            try:
                f = open(fileName, 'a+', 1, 'UTF-8')
                return f
            except IOError:
                return False
 
talker = Talker()
talker.talk()