Python 中的 Open() 和 read() 方法不会添加到列表中

Question

首先，我将发布我的代码。我觉得有一个简单的答案，我不知何故忽略了。

questionsList=[]
answersList=[]
def retrieveQuestions():
f=open('Questions.txt')
questionsList=f.read().splitlines()
for row in f:
questionsList.append(row)
def retrieveAnswers():
with open('Answers.txt') as j:
answersList=list(j.read().splitlines())
retrieveQuestions()
retrieveAnswers()
print(questionsList)
print(answersList)

当我运行程序时，我得到的输出 [] [] 我查找了多种文件路径方法，多种读取方式和.splitlines((，但我仍然不知道出了什么问题。

Answer 1

目前，您的方法仅创建和填充列表，而没有其他内容 - 没有屏幕输出或返回。只需向函数添加一个return，并为变量赋值，然后在每个调用的函数中打印或print。而且，当您在方法中定义变量时，您不需要在顶部进行全局变量赋值。

返回和分配

def retrieveQuestions():
f=open('1222_2016_2016-2017.csv')
questionsList=f.read().splitlines()
for row in f:
questionsList.append(row)
f.close()
return questionsList
def retrieveAnswers():
with open('ODDFiles.csv') as j:
answersList=list(j.read().splitlines())
return answersList
questionsList = retrieveQuestions()
answersList = retrieveAnswers()
print(questionsList)
print(answersList)

内部打印

def retrieveQuestions():
f=open('1222_2016_2016-2017.csv')
questionsList=f.read().splitlines()
for row in f:
questionsList.append(row)
print(questionsList)
def retrieveAnswers():
with open('ODDFiles.csv') as j:
answersList=list(j.read().splitlines())
print(answersList)
retrieveQuestions()
retrieveAnswers()

Answer 2

试试看：

questionsList=[]
answersList=[]
def retrieveQuestions():
f=open('Questions.txt', 'r')
questionsList = f.readlines().splitlines()
def retrieveAnswers():
with open('Answers.txt', 'r') as j:
answersList = j.readlines().splitlines()
retrieveQuestions()
retrieveAnswers()
print(questionsList)
print(answersList)

苏格斯：

def read_file(filename):
return open(filename, 'r').readlines().splitlines()
questionsList = read_file('Questions.txt')
answersList = read_file('Answers.txt')
print(questionsList)
print(answersList)