Question

我的问题是我的列表（lst）没有存储在文件中。你拥有的美好社区。我是该网站的新手，所以请在评论中注意这一点。以下是我很久以前能够存储它的代码，但有问题，所以我取消了它，出于某种原因，在我的脑海中，我不记得我做了什么来存储它！

days = ["sunday","monday", "tuesday", "wednesday", "thursday", "friday", "saturday"]
answered = False
while answered == False:
    userInput = input("What day of the week would you like to assign a event: ")
    lst = []
    input_words=userInput.lower().split()
    for word in input_words:
        if word in days:
            lst.append(word)
            print(word)
            # set answered to True boolean
            answered = True 
            print((lst))      
    # only evaulated after reviewing all words, if True is not set, prompts user again and let's them know that their answer is not valid
    if answered == False:
         print("You typed days of week wrong! Try Again!")
def listToString(): 
  if 0 < 2:
    test = open('hold.txt', 'a')
    print(test.write(lst + '\n'))
    test.close()
    return listToString

'a+' 不起作用！！在复制我已经尝试了很多事情，但是我真的很相信我，我有一个解释。但是当我将 lst 放入文件时，我希望它在每一行上间隔开，所以对于每个项目，我希望它在一个新行上，但不仅仅是存储 1 个项目。我是这个网站的新手。也有人想告诉我为什么我的代码不断给我输出似乎是我写入文件的列表中的 1 个项目的大小

Answer 1

以下几点需要修改：

需要将列表转换为str
调用 listToString() 方法

days = ["sunday","monday", "tuesday", "wednesday", "thursday", "friday", "saturday"]
answered = False
while answered == False:
    userInput = input("What day of the week would you like to assign a event: ")
    lst = []
    input_words=userInput.lower().split()
    for word in input_words:
        if word in days:
            lst.append(word)
            print(word)
            # set answered to True boolean
            answered = True 
            print((lst))      
    # only evaulated after reviewing all words, if True is not set, prompts user again and let's them know that their answer is not valid
    if answered == False:
         print("You typed days of week wrong! Try Again!")
def listToString(): 
  if 0 < 2:
    test = open('hold.txt', 'a')
    # and list is not able to con-cat with str, so need to convert that too
    test.write(str(lst) + '\n')
    test.close()
    return listToString

# you need to call the method to execute the method code
listToString()

Answer 2

您是要调用您的函数吗：

def listToString(lst): 
    with open('hold.txt', 'a') as test:
        test.write(str(lst) + '\n')

listToString(lst)

Answer 3

days = ["sunday","monday", "tuesday", "wednesday", "thursday", "friday", "saturday"]
answered = False
while answered == False:
    userInput = input("What day of the week would you like to assign a event: ")
    lst = []
    input_words=userInput.lower().split()
    for word in input_words:
        if word in days:
            lst.append(word)
            print(word)
            # set answered to True boolean
            answered = True 
            print(lst)      
    # only evaluated after reviewing all words, if True is not set, prompts user again and let's them know that their answer is not valid
    if answered == False:
         print("You typed days of week wrong! Try Again!")

def listToString(): 
    with open('hold.txt', 'w') as f:
    for day in lst: 
        f.write(day + '\n')

listToString()

还建议使用 with 打开和关闭您的文件。您可以找到有关它的更多信息 here. 我将每天的条目打印在单独的一行中，如果您只想将列表打印在一行上，您可以将其改回并添加 str(lst)。

Answer 4

我检查了你的代码。为了让您知道 quamrana 所说的是必要的，我运行了代码并认为您可能会在两件事上失败：

def listToString(): 
  if 0 < 2:
    test = open('hold.txt', 'a')
    test.writelines(line+'\n' for line in lst)
    test.close()
    return

if __name__=="__main__":
  days = ["sunday","monday", "tuesday", "wednesday", "thursday", "friday", "saturday"]
  answered = False
  while answered == False:
      userInput = input("What day of the week would you like to assign a event: ")
      lst = []
      input_words=userInput.lower().split()
      for word in input_words:
          if word in days:
              lst.append(word)
              print(word)
              # set answered to True boolean
              answered = True 
              print((lst))
      # only evaulated after reviewing all words, if True is not set, prompts user again and let's them know that their answer is not valid
      if answered == False:
          print("You typed days of week wrong! Try Again!")

如果你按原样调用函数，那么它会给你一个错误，因为 lst 是一个列表而 '\n' 是一个字符串，因此，我建议使用 writelines 方法将每个元素写入列表并在其末尾添加一个“\n”
我认为，您可能希望将 lst 作为参数传递而不使用全局变量注意：我对文件进行了格式化，以便于阅读

为什么我的列表没有存储在hold.txt 中？

4 个答案: