Python实现用户输入Y后读取文本文件下一行的问题排查

逐行读取重复返回第一行的核心原因是：每次触发继续读取的逻辑时，你都重新执行了打开facts.txt的操作。文件重新打开后，读取指针会自动回到文件起始位置，因此每次调用readline()拿到的永远是文件的第一行内容。

• 整个读取事实的流程中只打开一次facts.txt，不要在循环内重复打开文件
• 将打开的文件对象在读取逻辑中传递，每次调用readline()时指针会自动向后偏移，就能顺序拿到下一行内容
• 增加文件读完的判断：当readline()返回空字符串时，说明所有内容已经读取完毕，直接给出结束提示即可

# Defining functions
def well_bot():
    print("Hi there, my name is Well Bot. ")
    print("My job is to tell people general facts about mental health and different types of mental illnesses. ")
    
    info = get_info()
    print(info)
    
    # 原代码此处调用未定义的print_facts()会直接报错，按优先解决逐行读取问题的要求暂时注释，后续可自行补全
    #this should only print if they want a fact
    # getfact = print_facts()
    # print(getfact)

    #var to read from illnesses text file to add later


def get_info():
    res = input("What can I teach you about today? \n[a] Facts \n[b] Types \n> ")

    if res == "a":
        print ("Okay. I will give you some general facts about mental health. ")
        with open('facts.txt') as facts:
            next_fact = facts.readline()
            print (next_fact)
            # 传入已打开的文件对象，避免后续重复打开文件
            return continue_ask(facts)
    
    elif res == "b":
        return "Okay, I can tell you about two different mental illnesses: \n[1] Depression \n[2] Bipolar Disorder \n> "
    else:
        print_message()
        return get_info()

def continue_ask(facts):
    while True:
        user_input = input("Want to know more? Enter Y to continue or N to finish: ")
        if user_input == "Y":
            next_fact = facts.readline()
            # 读到空内容说明文件已全部读取完毕
            if not next_fact:
                print("No more mental health facts available for now!")
                print("Okay, thanks, bye! ")
                break
            print(next_fact)
        else:
            print ("Okay, thanks, bye! ")
            break

def print_message():
    print("I'm sorry, I didn't quite get that. Can you choose again? ")
    return get_info()

#Call Bot
well_bot()

说明：原代码well_bot函数中调用了未定义的print_facts()，运行时会直接抛出错误，我按你提出的「优先解决逐行读取问题、暂不排查其他潜在问题」的要求将这两行临时注释，你后续可以根据功能规划补全对应逻辑。

内容的提问来源于stack exchange，提问作者sillysausage