用py 编写能用图形界面计算器

以下是一个基本的使用Python和Tkinter库编写的计算器GUI：

import tkinter as tk

class Calculator:
    def __init__(self, master):
        self.master = master
        master.title("Calculator")

        # Create input field
        self.entry = tk.Entry(master, width=25, justify="right", font=("Arial", 16))
        self.entry.grid(row=0, column=0, columnspan=4, padx=5, pady=5)

        # Create buttons
        self.create_button("7", 1, 0)
        self.create_button("8", 1, 1)
        self.create_button("9", 1, 2)
        self.create_button("/", 1, 3)

        self.create_button("4", 2, 0)
        self.create_button("5", 2, 1)
        self.create_button("6", 2, 2)
        self.create_button("*", 2, 3)

        self.create_button("1", 3, 0)
        self.create_button("2", 3, 1)
        self.create_button("3", 3, 2)
        self.create_button("-", 3, 3)

        self.create_button("0", 4, 0)
        self.create_button(".", 4, 1)
        self.create_button("C", 4, 2)
        self.create_button("+", 4, 3)

        self.create_button("=", 5, 0, 1, 4)

    def create_button(self, text, row, column, rowspan=1, columnspan=1):
        button = tk.Button(self.master, text=text, width=5, height=2, font=("Arial", 16))
        button.grid(row=row, column=column, rowspan=rowspan, columnspan=columnspan, padx=5, pady=5)
        button.bind("<Button-1>", self.click)

    def click(self, event):
        button = event.widget
        text = button["text"]

        if text == "=":
            try:
                result = eval(self.entry.get())
                self.entry.delete(0, tk.END)
                self.entry.insert(0, result)
            except:
                self.entry.delete(0, tk.END)
                self.entry.insert(0, "Error")
        elif text == "C":
            self.entry.delete(0, tk.END)
        else:
            self.entry.insert(tk.END, text)

root = tk.Tk()
calculator = Calculator(root)
root.mainloop()

这个计算器GUI使用Tkinter库来创建窗口和按钮。每个按钮都与 create_button() 方法关联，该方法创建并设置按钮的位置，大小和事件绑定。点击按钮时，会触发 click() 方法，该方法根据按钮上的文本执行相应的计算或清除操作，并在输入字段中更新结果。