使用python和其中的tkinter库实现一个科学计算器，至少能实现加运算、减运算、乘运算、除运算、幂运算和取余运算，需带有清除功能，可以清空之前计算的结果

好的，以下是一个简单的使用 Python 和 Tkinter 实现的科学计算器，可以进行加、减、乘、除、幂和取余运算，并且具有清除功能。

from tkinter import *

class Calculator:
    def __init__(self, master):
        self.master = master
        master.title("科学计算器")

        # 创建输入框
        self.entry = Entry(master, width=35, borderwidth=5)
        self.entry.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

        # 创建按钮
        self.button_1 = Button(master, text="1", padx=40, pady=20, command=lambda: self.button_click(1))
        self.button_2 = Button(master, text="2", padx=40, pady=20, command=lambda: self.button_click(2))
        self.button_3 = Button(master, text="3", padx=40, pady=20, command=lambda: self.button_click(3))
        self.button_4 = Button(master, text="4", padx=40, pady=20, command=lambda: self.button_click(4))
        self.button_5 = Button(master, text="5", padx=40, pady=20, command=lambda: self.button_click(5))
        self.button_6 = Button(master, text="6", padx=40, pady=20, command=lambda: self.button_click(6))
        self.button_7 = Button(master, text="7", padx=40, pady=20, command=lambda: self.button_click(7))
        self.button_8 = Button(master, text="8", padx=40, pady=20, command=lambda: self.button_click(8))
        self.button_9 = Button(master, text="9", padx=40, pady=20, command=lambda: self.button_click(9))
        self.button_0 = Button(master, text="0", padx=40, pady=20, command=lambda: self.button_click(0))
        self.button_add = Button(master, text="+", padx=39, pady=20, command=self.button_add)
        self.button_subtract = Button(master, text="-", padx=41, pady=20, command=self.button_subtract)
        self.button_multiply = Button(master, text="*", padx=40, pady=20, command=self.button_multiply)
        self.button_divide = Button(master, text="/", padx=41, pady=20, command=self.button_divide)
        self.button_power = Button(master, text="^", padx=39, pady=20, command=self.button_power)
        self.button_modulus = Button(master, text="%", padx=40, pady=20, command=self.button_modulus)
        self.button_clear = Button(master, text="清空", padx=76, pady=20, command=self.button_clear)
        self.button_equal = Button(master, text="=", padx=91, pady=20, command=self.button_equal)

        # 添加按钮到窗口
        self.button_1.grid(row=3, column=0)
        self.button_2.grid(row=3, column=1)
        self.button_3.grid(row=3, column=2)

        self.button_4.grid(row=2, column=0)
        self.button_5.grid(row=2, column=1)
        self.button_6.grid(row=2, column=2)

        self.button_7.grid(row=1, column=0)
        self.button_8.grid(row=1, column=1)
        self.button_9.grid(row=1, column=2)

        self.button_0.grid(row=4, column=0)
        self.button_clear.grid(row=4, column=1, columnspan=2)
        self.button_add.grid(row=5, column=0)
        self.button_subtract.grid(row=6, column=0)
        self.button_multiply.grid(row=6, column=1)
        self.button_divide.grid(row=6, column=2)
        self.button_power.grid(row=5, column=1)
        self.button_modulus.grid(row=5, column=2)
        self.button_equal.grid(row=4, column=3, columnspan=2)

        self.first_number = None
        self.operation = None

    # 按钮事件函数
    def button_click(self, number):
        current = self.entry.get()
        self.entry.delete(0, END)
        self.entry.insert(0, str(current) + str(number))

    def button_clear(self):
        self.entry.delete(0, END)
        self.first_number = None
        self.operation = None

    def button_add(self):
        self.first_number = float(self.entry.get())
        self.entry.delete(0, END)
        self.operation = "+"

    def button_subtract(self):
        self.first_number = float(self.entry.get())
        self.entry.delete(0, END)
        self.operation = "-"

    def button_multiply(self):
        self.first_number = float(self.entry.get())
        self.entry.delete(0, END)
        self.operation = "*"

    def button_divide(self):
        self.first_number = float(self.entry.get())
        self.entry.delete(0, END)
        self.operation = "/"

    def button_power(self):
        self.first_number = float(self.entry.get())
        self.entry.delete(0, END)
        self.operation = "^"

    def button_modulus(self):
        self.first_number = float(self.entry.get())
        self.entry.delete(0, END)
        self.operation = "%"

    def button_equal(self):
        second_number = float(self.entry.get())
        self.entry.delete(0, END)

        if self.operation == "+":
            result = self.first_number + second_number
        elif self.operation == "-":
            result = self.first_number - second_number
        elif self.operation == "*":
            result = self.first_number * second_number
        elif self.operation == "/":
            result = self.first_number / second_number
        elif self.operation == "^":
            result = self.first_number ** second_number
        elif self.operation == "%":
            result = self.first_number % second_number

        self.entry.insert(0, result)

# 创建主窗口
root = Tk()
my_calculator = Calculator(root)
root.mainloop()

运行上述代码，即可看到一个具有加、减、乘、除、幂和取余运算，并且具有清除功能的科学计算器界面。