Question

我编写了我的程序，让它全部工作，我开始对它进行更改，因此它更有效率，我被告知要使用一个类，我以前从未使用过一个，我试图使用一个类，程序运行正常，直到你点击去，我可以看到为什么你得到这个错误，我认为它与两个＆＃39;＆＃39;在第11行，但我不确定我应该把它放在那里。

#Imports
import tkinter
from tkinter import *
from tkinter.filedialog import askopenfilename
from tkinter.filedialog import asksaveasfilename
from tkinter.messagebox import showerror
from tkinter import filedialog
import sys

class MyFileManager(object):
    def __init__(self, filename='', save_filename=''):
        self.filename = filename
        self.save_filename = save_filename


    def save_users_list(self, list_name):
        with open(self.filename, 'r') as file:
            users_list = [line.strip() for line in file.readLines()]

        with open(self.save_filename, 'w') as file:
            file.write('{} = {}'.format(list_name, str(users_list)))


    def get_filename(self):
        self.save_filename = askopenfilename(filetypes=(("Text files", "*.txt"),
                                                        ("All files", "*.*")))


    def get_save_file(self):
        self.save_filename = asksaveasfilename(filetypes=(("Text files", "*.txt"),
                                                          ("All files", "*.*")))

manager = MyFileManager()

#Window
window = tkinter.Tk()
window.title("Python List Maker")
window.geometry("300x170")

#Label
file_select_label = tkinter.Label(window, text="Please select your file:")
file_select_label.pack()

#Button
filename_button = tkinter.Button(window, text="Browse", command=manager.get_filename)
filename_button.pack()

#List Name
list_name_label = tkinter.Label(window,text="Please enter what you want to call the list:")
list_name_label.pack()
list_name = Entry(window)
list_name.pack()

#Save List
save_list_label = tkinter.Label(window,text="Please select where you want to save the list:")
save_list_label.pack()
save_filename_button = tkinter.Button(window, text="Browse", command=manager.get_save_file)
save_filename_button.pack()

#Go
go_button = tkinter.Button(window, text="Go!", command=lambda: manager.save_users_list(
                                                                    list_name.get()))
go_button.pack()

#Main Loop
window.mainloop()

以下是我收到的错误：

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python3.4/tkinter/__init__.py", line 1490, in __call__
    return self.func(*args)
  File "/home/ashleymoakes/Desktop/Learning Python/WIP/List Maker/List Maker - Re-Write.py", line 62, in <lambda>
    list_name.get()))
  File "/home/ashleymoakes/Desktop/Learning Python/WIP/List Maker/List Maker - Re-Write.py", line 17, in save_users_list
    with open(self.filename, 'r') as file:
FileNotFoundError: [Errno 2] No such file or directory: ''

此外，如果它有助于我运行Python 3.3

Answer 1

您的问题是您从未将self.filename变量设置为空，因此python无法找到名为''的文件。我猜您必须将get_filename()更改为以下内容：

def get_filename(self):
    self.filename = askopenfilename(filetypes=(("Text files", "*.txt"),
                                                    ("All files", "*.*")))
         ^
     variable name changed

没有这样的文件或目录 - 简单的错误

1 个答案: