请你帮我用python和ttk来帮我实现一个好看的GUI计算器

好的，这个问题很简单。以下是Python代码实现一个好看的GUI计算器：

from tkinter import *
from tkinter import ttk

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

        # create input field
        self.input_field = ttk.Entry(master, width=40)
        self.input_field.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

        # create buttons
        button_list = [
            "7", "8", "9", "+",
            "4", "5", "6", "-",
            "1", "2", "3", "*",
            "0", ".", "=", "/"
        ]
        r = 1
        c = 0
        for b in button_list:
            ttk.Button(master, text=b, command=lambda button=b: self.button_click(button)).grid(row=r, column=c, padx=5, pady=5)
            c += 1
            if c > 3:
                c = 0
                r += 1

    def button_click(self, button):
        current = self.input_field.get()
        if button == "C":
            self.input_field.delete(0, END)
        elif button == "=":
            try:
                result = eval(current)
                self.input_field.delete(0, END)
                self.input_field.insert(0, result)
            except:
                self.input_field.delete(0, END)
                self.input_field.insert(0, "Error!")
        else:
            self.input_field.insert(END, button)

root = Tk()
calc = Calculator(root)

root.mainloop()

以上代码创建了一个能实现加减乘除四则运算的GUI计算器，使用了Python的Tkinter库和ttk模块。您可以根据自己的喜好对GUI界面进行调整。