Python Tkinter文件浏览器退出自动打开所在目录问题求解

基于Python+Tkinter开发的文件浏览器已实现打开文件、打开文件夹、删除文件/文件夹、列出指定目录内容的核心功能，常规操作运行无异常，但存在固定Bug：程序启动后无任何操作、或是直接关闭程序时，会自动弹出程序源码所在的保存目录。

#1 import all the libraries
import os
import tkinter.filedialog as fd
import tkinter.messagebox as mb
from tkinter import *

#2 Defining the functions ->>>> four Function

def open_file(): #a function for opening file
    file = fd.askopenfilename(title='choose a file to open',filetypes=[('All files','*.*')])
    os.startfile(file)
def open_folder():
    foldertodlt = fd.askdirectory(title='Select a folder to Open')
    os.startfile(foldertodlt)
def delete_file():
    filetodlt = fd.askopenfilename(title='Select a File to Delete! ',filetypes=[('All files','*.*')])
    os.remove(filetodlt)
    mb.showinfo(title='Deleting File', message='File Deleted! ')
def delete_folder():
    fodlertodlt = fd.askdirectory(title='Select a Folder to Delete! ')
    os.rmdir(fodlertodlt)
    mb.showinfo(title='Deleting Folder ?', message='Folder Deleted')
def list_directories():
    folder = fd.askdirectory(title='Select a Directory to list it's files and folders ')
    files = os.listdir(folder)
    listfiles = Toplevel(windowframe)
    listfiles.title(f'Files and Folders in {folder}')
    listfiles.resizable(1,1)
    listbox = Listbox(listfiles, selectbackground='gray', font=('courier',20))
    listbox.place(relx=0,rely=0,relheight=1,relwidth=1)

    i = 0
    while i <len(files):
        listbox.insert(END,files[i])
        i += 1

#3 creating the window .. we must creat an object from the tkinter class and use it

windowframe = Tk()
windowframe.title('File Browser')
windowframe.geometry('300x300')
windowframe.resizable(0,0)
windowframe.config(background='orange')
windowframe.iconbitmap('icon.ico')

#4 creating the buttons to and calling the functions

Button (windowframe, text='Open a File',foreground='white', width=20, font='Courier',background='gray',command=open_file).place(x=50,y=50)
Button (windowframe, text='Open a Folder',foreground='white',width=20, font='Courier',background='gray',command=open_folder).place(x=50,y=100)
Button (windowframe, text='Delete a File',foreground='white',width=20,font='Courier',background='gray',command=delete_file).place(x=50, y= 150)
Button (windowframe, text='Delete a Folder',foreground='white',width=20,font='courier',background='gray',command=delete_folder).place(x=50, y=200)
Button (windowframe, text='List all Directories',foreground='white',width=20,font='courier',background='gray',command=list_directories).place(x=50, y=250)


windowframe.update()
windowframe.mainloop()

• 主窗口启动前多余调用windowframe.update()，打乱Tkinter原生窗口初始化时序，导致文件选择对话框组件在初始化阶段被异常触发，返回空路径值。
• 所有文件/文件夹选择逻辑未做空路径校验：当用户点击对话框「取消」按钮、或是组件异常返回空字符串时，直接调用os.startfile("")，Windows系统下该语句的默认行为就是打开程序当前工作目录（即源码保存目录）。
• 图标加载逻辑无异常捕获，若运行目录下不存在icon.ico文件，会触发Tkinter内部组件状态异常，间接导致对话框误触发。
• 原始代码存在语法错误：list_directories函数的对话框标题用单引号包裹时，it's中的单引号会提前截断字符串，直接触发运行报错。

• 删除windowframe.mainloop()前多余的windowframe.update()调用，遵循Tkinter标准事件循环初始化逻辑。
• 所有文件/文件夹选择对话框的返回值，先判断是否为空，为空则直接终止后续文件操作，避免空路径传入系统接口。
• 给图标加载增加异常捕获，避免图标文件缺失导致的程序异常。
• 给所有文件对话框、消息框指定parent参数绑定主窗口，避免焦点错位导致的组件异常。
• 修正字符串引号嵌套的语法错误。

import os
import tkinter.filedialog as fd
import tkinter.messagebox as mb
from tkinter import *

def open_file():
    file = fd.askopenfilename(
        parent=windowframe,
        title='choose a file to open',
        filetypes=[('All files','*.*')]
    )
    if not file:
        return
    os.startfile(file)

def open_folder():
    foldertodlt = fd.askdirectory(
        parent=windowframe,
        title='Select a folder to Open'
    )
    if not foldertodlt:
        return
    os.startfile(foldertodlt)

def delete_file():
    filetodlt = fd.askopenfilename(
        parent=windowframe,
        title='Select a File to Delete! ',
        filetypes=[('All files','*.*')]
    )
    if not filetodlt:
        return
    os.remove(filetodlt)
    mb.showinfo(title='Deleting File', message='File Deleted! ', parent=windowframe)

def delete_folder():
    fodlertodlt = fd.askdirectory(
        parent=windowframe,
        title='Select a Folder to Delete! '
    )
    if not fodlertodlt:
        return
    os.rmdir(fodlertodlt)
    mb.showinfo(title='Deleting Folder ?', message='Folder Deleted', parent=windowframe)

def list_directories():
    folder = fd.askdirectory(
        parent=windowframe,
        title="Select a Directory to list it's files and folders "
    )
    if not folder:
        return
    files = os.listdir(folder)
    listfiles = Toplevel(windowframe)
    listfiles.title(f'Files and Folders in {folder}')
    listfiles.resizable(1,1)
    listbox = Listbox(listfiles, selectbackground='gray', font=('courier',20))
    listbox.place(relx=0,rely=0,relheight=1,relwidth=1)
    for f in files:
        listbox.insert(END, f)

windowframe = Tk()
windowframe.title('File Browser')
windowframe.geometry('300x300')
windowframe.resizable(0,0)
windowframe.config(background='orange')
# 增加图标加载异常捕获
try:
    windowframe.iconbitmap('icon.ico')
except:
    pass

Button(windowframe, text='Open a File',foreground='white', width=20, font='Courier',background='gray',command=open_file).place(x=50,y=50)
Button(windowframe, text='Open a Folder',foreground='white',width=20, font='Courier',background='gray',command=open_folder).place(x=50,y=100)
Button(windowframe, text='Delete a File',foreground='white',width=20,font='Courier',background='gray',command=delete_file).place(x=50, y= 150)
Button(windowframe, text='Delete a Folder',foreground='white',width=20,font='courier',background='gray',command=delete_folder).place(x=50, y=200)
Button(windowframe, text='List all Directories',foreground='white',width=20,font='courier',background='gray',command=list_directories).place(x=50, y=250)

windowframe.mainloop()

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