由于我不知道问题的根源，我将张贴所有的代码（不多）。这是一个价值观错误：
这是我的main.py

from cmdClass import *
import re
import os

mainObject = Cmd()
while True:
    try:
        userInput = str(input(f"${mainObject.getAccount()}: "))
        matches = re.search(r'^^(create|open|kill|exit) -(?:\s+([^\s]+))?$', userInput)
        if matches != True:
            raise ValueError
        else:
            command = matches.group(1)
            if matches.group(2) != None:
                parameter = matches.group(2)
    except FileNotFoundError:
        mainObject.programExit(f"Your parameter (file-name) was invalid")
    except ValueError:
        mainObject.programExit(f"Your input was invalid")
    except TypeError:
        mainObject.programExit(f"You passed unwanted arguments")
    
    if command == "create":
        try:
            mainObject.create(parameter)
        except NameError:
            mainObject.programExit("No argument was passed")
    elif command == "kill":
        try:
            mainObject.kill(parameter)
        except NameError:
            mainObject.programExit("No argument was passed")
    elif command == "open":
        try:
            mainObject.fileOpen(parameter)
        except NameError:
            mainObject.programExit("No argument was passed")
    elif command == "exit":
        mainObject.programExit()

这是我的类在不同的文件

import os

class Cmd:
    def __init__(self):
        self.account = input("Account Name: ")
    def create(self, fileName):
        file = open(f"{self.account}_{fileName}", 'x')
    def programExit(self, exitMessage=None):
        exit(exitMessage)
    def kill(self, fileName):
        os.remove(fileName)
    def fileOpen(self, fileName):
        with open(fileName, 'a+') as file:
            for i in file.readlines():
                print(i)
            lineNum = 0
            while True:
                lineNum += 1
                line = input(f"{lineNum} ")
                if line != "q\?":
                    file.write(line)
                else:
                    break
    def getAccount(self):
        return self.account

可能是正则表达式有问题，所以请检查一下。
下面是一个屏幕截图发生了什么：

它创建了一个值错误（非常肯定它的自我提升，但在这种情况下不应该发生）。请不要重写代码，除非有重大问题;我想自己解决这事。