Json A12 计算总和

# -*- coding: utf-8 -*-
import json
import tkinter as tk
from tkinter import filedialog, messagebox

def calculate_total():
try:
inputfile = file_entry.get()
if not inputfile:
messagebox.showerror("错误", "请先选择文件")
return

with open(inputfile, 'r', encoding='gbk') as f:
data = json.load(f)

        total_a12 = 0
for feature in data['features']:
a12_str = feature['attributes']['A12']
if a12_str:  # 确保A12不是空字符串
total_a12 += float(a12_str)

        result_label.config(text=f"A12字段的总和为: {total_a12}")
except Exception as e:
messagebox.showerror("错误", f"计算过程中出现错误:\n{str(e)}")

def browse_file():
filename = filedialog.askopenfilename(
title="选择JSON文件",
filetypes=(("JSON文件", "*.json"), ("文本文件", "*.txt"), ("所有文件", "*.*"))
)
if filename:
file_entry.delete(0, tk.END)
file_entry.insert(0, filename)

# 创建主窗口
root = tk.Tk()
root.title("A12字段总和计算器")
root.geometry("500x200")

# 文件选择部分
file_frame = tk.Frame(root)
file_frame.pack(pady=10)

tk.Label(file_frame, text="文件路径:").pack(side=tk.LEFT)
file_entry = tk.Entry(file_frame, width=40)
file_entry.pack(side=tk.LEFT, padx=5)

browse_button = tk.Button(file_frame, text="浏览...", command=browse_file)
browse_button.pack(side=tk.LEFT)

# 计算按钮
calc_button = tk.Button(root, text="计算总和", command=calculate_total)
calc_button.pack(pady=10)

# 结果显示
result_label = tk.Label(root, text="", font=('Arial', 12))
result_label.pack(pady=20)

# 运行主循环
root.mainloop()