Tkinter库存系统：优化文件操作与条码生成逻辑

import tkinter as tk
from tkinter import messagebox
import random
from barcode import EAN13
from barcode.writer import ImageWriter
import json
import os

def onClick():
    # 确保每次点击时生成新的随机数
    number = str(random.randint(100000000000, 999999999999))

    # 文件路径定义
    barcode_file = "barcode_numbers.txt"
    description_file = "item_description.txt"

    # 使用with语句确保文件自动关闭
    with open(barcode_file, "a+") as file1:
        # 在读取前将文件指针移到文件开头
        file1.seek(0)
        # 读取所有已存在的条码号，并去除空白符（如换行符）
        existing_barcodes = {line.strip() for line in file1.readlines()}

        # 检查条码是否重复
        if number not in existing_barcodes:
            messagebox.showinfo("Success!", number)
            # 写入新的条码号，文件指针会自动移到末尾
            file1.write(number + "\n")

            # 生成条码图片
            new_code = EAN13(number, writer=ImageWriter())
            new_code.save(number)

            # 写入商品描述
            with open(description_file, "a+") as file2:
                file2.write(f"{number}: {item.get()}\n")
        else:
            messagebox.askretrycancel("ERROR", "Duplicate barcode generated. Quit or try again.")

# 假设item是一个Tkinter Entry组件
# root = tk.Tk()
# item = tk.Entry(root)
# item.pack()
# tk.Button(root, text="Submit", command=onClick).pack()
# root.mainloop()

import tkinter as tk
from tkinter import messagebox
import random
from barcode import EAN13
from barcode.writer import ImageWriter
import json
import os

# 定义JSON文件路径
DATA_FILE = "inventory_data.json"

def load_inventory_data():
    """从JSON文件加载库存数据"""
    if os.path.exists(DATA_FILE):
        with open(DATA_FILE, "r", encoding="utf-8") as f:
            try:
                return json.load(f)
            except json.JSONDecodeError:
                # 文件为空或格式错误时返回空字典
                return {}
    return {}

def save_inventory_data(data):
    """将库存数据保存到JSON文件"""
    with open(DATA_FILE, "w", encoding="utf-8") as f:
        json.dump(data, f, indent=4, ensure_ascii=False)

def onClick_json():
    """使用JSON存储的按钮点击事件处理函数"""
    number = str(random.randint(100000000000, 999999999999))
    item_description = item.get().strip() # 获取用户输入的描述并去除首尾空白

    inventory_data = load_inventory_data()

    if number not in inventory_data:
        if not item_description: # 检查描述是否为空
            messagebox.showwarning("Warning", "Item description cannot be empty!")
            return

        inventory_data[number] = item_description
        save_inventory_data(inventory_data)

        messagebox.showinfo("Success!", f"Barcode: {number}\nDescription: {item_description}")

        # 生成条码图片
        new_code = EAN13(number, writer=ImageWriter())
        new_code.save(number)

        # 清空输入框以便下次输入
        item.delete(0, tk.END)
    else:
        messagebox.askretrycancel("ERROR", "Duplicate barcode generated. Quit or try again.")

# Tkinter UI设置 (示例)
root = tk.Tk()
root.title("库存管理系统")

tk.Label(root, text="商品描述:").pack(pady=5)
item = tk.Entry(root, width=50)
item.pack(pady=5)

submit_button = tk.Button(root, text="生成并保存条码", command=onClick_json)
submit_button.pack(pady=10)

root.mainloop()