Python Tkinter 文件对话框：实现用户自定义文件保存路径选择

import tkinter as tk
from tkinter import filedialog

# 1. 初始化Tkinter根窗口
root = tk.Tk()
# 2. 隐藏根窗口，使其不显示
root.withdraw()

# 调用目录选择对话框
selected_folder = filedialog.askdirectory()

if selected_folder:
    print(f"用户选择了目录: {selected_folder}")
else:
    print("用户取消了目录选择。")

# 注意：如果程序是一个完整的GUI应用，通常不需要root.withdraw()，
# 并且会在最后调用root.mainloop()来启动事件循环。
# 对于这种只使用文件对话框的场景，程序会在对话框关闭后立即退出。

import os
import tkinter as tk
from tkinter import filedialog

# 1. 初始化Tkinter根窗口并隐藏
# 这一步是使用filedialog模块的关键
root = tk.Tk()
root.withdraw()

def add_numbers_and_save():
    """
    循环接收用户输入的数字进行加法运算，
    并将结果保存到用户选择的目录中。
    """
    attempts = 0
    results = []
    max_attempts = 3 # 设定最大尝试次数

    while attempts < max_attempts:
        try:
            num1_str = input(f"[{attempts + 1}/{max_attempts}] 请输入第一个数字: ")
            # 允许用户输入'q'或'quit'退出
            if num1_str.lower() in ('q', 'quit'):
                print("用户选择退出。")
                break
            num1 = float(num1_str)

            num2_str = input(f"[{attempts + 1}/{max_attempts}] 请输入第二个数字: ")
            if num2_str.lower() in ('q', 'quit'):
                print("用户选择退出。")
                break
            num2 = float(num2_str)

            result = num1 + num2
            equation = f"{num1} + {num2} = {result}"

            print(f"计算结果: {equation}")
            results.append(equation)
            attempts += 1

        except ValueError:
            attempts += 1
            print("输入无效。请输入有效的数字。")
        except Exception as e:
            print(f"发生未知错误: {e}")
            attempts += 1

    if not results:
        print("没有可保存的计算结果。")
        return

    # 提示用户选择保存目录
    print("\n请选择一个目录来保存计算结果文件...")
    save_folder = filedialog.askdirectory(
        title="选择保存结果的文件夹"
    )

    if not save_folder:
        print("用户取消了目录选择，结果未保存。")
        return

    save_filename = "results.txt"
    # 组合完整的文件保存路径
    save_location = os.path.join(save_folder, save_filename)

    try:
        with open(save_location, 'w', encoding='utf-8') as file:
            for equation in results:
                file.write(equation + '\n')
        print(f"所有计算结果已成功保存到: {save_location}")
    except IOError as e:
        print(f"保存文件时发生错误: {e}")
    except Exception as e:
        print(f"发生未知错误: {e}")

    print("程序执行完毕。")

if __name__ == "__main__":
    add_numbers_and_save()