import tkinter as tk from tkinter import ttk from forex_python.converter import CurrencyRates # 创建货币转换器对象 c = CurrencyRates() # 创建主窗口 root = tk.Tk() root.title('货币转换器') # 创建控件 amount_label = ttk.Label(root, text='金额：') amount_entry = ttk.Entry(root) from_currency_label = ttk.Label(root, text='从货币类型：') from_currency_combo = ttk.Combobox(root, values=['USD', 'EUR', 'JPY', 'GBP']) to_currency_label = ttk.Label(root, text='到货币类型：') to_currency_combo = ttk.Combobox(root, values=['USD', 'EUR', 'JPY', 'GBP']) convert_button = ttk.Button(root, text='转换') result_label = ttk.Label(root, text='转换结果：') result_value = ttk.Label(root, text='') # 控件布局 amount_label.grid(row=0, column=0, padx=5, pady=5, sticky='w') amount_entry.grid(row=0, column=1, padx=5, pady=5) from_currency_label.grid(row=1, column=0, padx=5, pady=5, sticky='w') from_currency_combo.grid(row=1, column=1, padx=5, pady=5) to_currency_label.grid(row=2, column=0, padx=5, pady=5, sticky='w') to_currency_combo.grid(row=2, column=1, padx=5, pady=5) convert_button.grid(row=3, column=0, columnspan=2, padx=5, pady=5) result_label.grid(row=4, column=0, padx=5, pady=5, sticky='w') result_value.grid(row=4, column=1, padx=5, pady=5) # 定义转换函数 def convert(): amount = float(amount_entry.get()) from_currency = from_currency_combo.get() to_currency = to_currency_combo.get() result = c.convert(from_currency, to_currency, amount) result_value.config(text=result) # 绑定事件 convert_button.config(command=convert) # 运行主循环 tk.mainloop() 优化此程序使窗口能运行

以下是优化后的代码：

import tkinter as tk
from tkinter import ttk
from forex_python.converter import CurrencyRates

class CurrencyConverter:
    def __init__(self, root):
        self.root = root
        self.root.title('货币转换器')
        self.c = CurrencyRates()
        self.create_widgets()
    
    def create_widgets(self):
        # 创建控件
        amount_label = ttk.Label(self.root, text='金额：')
        self.amount_entry = ttk.Entry(self.root)
        from_currency_label = ttk.Label(self.root, text='从货币类型：')
        self.from_currency_combo = ttk.Combobox(self.root, values=['USD', 'EUR', 'JPY', 'GBP'])
        to_currency_label = ttk.Label(self.root, text='到货币类型：')
        self.to_currency_combo = ttk.Combobox(self.root, values=['USD', 'EUR', 'JPY', 'GBP'])
        convert_button = ttk.Button(self.root, text='转换', command=self.convert)
        result_label = ttk.Label(self.root, text='转换结果：')
        self.result_value = ttk.Label(self.root, text='')

        # 控件布局
        amount_label.grid(row=0, column=0, padx=5, pady=5, sticky='w')
        self.amount_entry.grid(row=0, column=1, padx=5, pady=5)
        from_currency_label.grid(row=1, column=0, padx=5, pady=5, sticky='w')
        self.from_currency_combo.grid(row=1, column=1, padx=5, pady=5)
        to_currency_label.grid(row=2, column=0, padx=5, pady=5, sticky='w')
        self.to_currency_combo.grid(row=2, column=1, padx=5, pady=5)
        convert_button.grid(row=3, column=0, columnspan=2, padx=5, pady=5)
        result_label.grid(row=4, column=0, padx=5, pady=5, sticky='w')
        self.result_value.grid(row=4, column=1, padx=5, pady=5)

    def convert(self):
        amount = float(self.amount_entry.get())
        from_currency = self.from_currency_combo.get()
        to_currency = self.to_currency_combo.get()
        result = self.c.convert(from_currency, to_currency, amount)
        self.result_value.config(text=result)

if __name__ == '__main__':
    # 创建主窗口并运行
    root = tk.Tk()
    currency_converter = CurrencyConverter(root)
    root.mainloop()

这里将原来的代码封装在一个类 `CurrencyConverter` 中，使得代码更加模块化和易读。将 `convert()` 方法绑定到转换按钮上，实现转换功能。同时将控件中需要动态修改的部分（如输入框、下拉框、结果标签）设为实例属性，方便在 `convert()` 方法中调用和修改。最后在 `__main__` 中创建主窗口并运行。