用Python，tkinter库，设计计算器。 可进行键盘输入、删除任意错误的字符、清空屏幕重新运算。 分父窗口计算，子窗口绘图。在父窗口点击“plot“按钮，可在子窗口绘图界面。其中，父窗口有显示输入数据、输出数据的两个屏幕，显示数据均为左对齐。 可实现实数的加、减、乘、除、幂、开方、对数、正弦、余弦、正切、余切等运算；实现括号改变运算顺序、进行实现小数与分数之间转换；可绘制函数图像，如指数函数、对数函数、幂函数、三角函数等函数图像，如，绘制”y=sin(x)”的函数图像，并可以通过按钮或键盘输入函数式

好的，我明白了你的问题。这是一个比较复杂的项目，需要用到Python和tkinter库的知识。我会尽力回答你的问题。

首先，你需要创建一个计算器界面，包括输入屏幕、输出屏幕和一些按钮。你可以使用tkinter库中的Entry组件来实现输入屏幕和输出屏幕，使用Button组件来实现按钮。

下面是一个简单的示例代码，用于创建一个具有输入和输出屏幕的计算器界面：

import tkinter as tk

root = tk.Tk()
root.title("Calculator")

input_screen = tk.Entry(root, width=50, borderwidth=5)
input_screen.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

output_screen = tk.Entry(root, width=50, borderwidth=5)
output_screen.grid(row=1, column=0, columnspan=4, padx=10, pady=10)

button_1 = tk.Button(root, text="1", padx=40, pady=20)
button_2 = tk.Button(root, text="2", padx=40, pady=20)
button_3 = tk.Button(root, text="3", padx=40, pady=20)
button_4 = tk.Button(root, text="4", padx=40, pady=20)

button_1.grid(row=2, column=0)
button_2.grid(row=2, column=1)
button_3.grid(row=2, column=2)
button_4.grid(row=2, column=3)

root.mainloop()

接下来，你需要实现计算器的功能。你可以使用Python中的eval()函数来计算数学表达式，使用math库来计算一些常见的函数，如sin、cos和tan。

下面是一个示例代码，用于在计算器中添加加法和减法的功能：

import tkinter as tk

def add_number(number):
    current = input_screen.get()
    input_screen.delete(0, tk.END)
    input_screen.insert(0, str(current) + str(number))

def clear_screen():
    input_screen.delete(0, tk.END)
    output_screen.delete(0, tk.END)

def add():
    first_number = float(input_screen.get())
    clear_screen()
    operation = "+"
    return (first_number, operation)

def subtract():
    first_number = float(input_screen.get())
    clear_screen()
    operation = "-"
    return (first_number, operation)

def equals():
    second_number = float(input_screen.get())
    input_screen.delete(0, tk.END)

    if operation == "+":
        result = first_number + second_number
    elif operation == "-":
        result = first_number - second_number

    output_screen.insert(0, result)

root = tk.Tk()
root.title("Calculator")

input_screen = tk.Entry(root, width=50, borderwidth=5)
input_screen.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

output_screen = tk.Entry(root, width=50, borderwidth=5)
output_screen.grid(row=1, column=0, columnspan=4, padx=10, pady=10)

button_1 = tk.Button(root, text="1", padx=40, pady=20, command=lambda:add_number(1))
button_2 = tk.Button(root, text="2", padx=40, pady=20, command=lambda:add_number(2))
button_3 = tk.Button(root, text="3", padx=40, pady=20, command=lambda:add_number(3))
button_4 = tk.Button(root, text="4", padx=40, pady=20, command=lambda:add_number(4))
button_add = tk.Button(root, text="+", padx=39, pady=20, command=add)
button_subtract = tk.Button(root, text="-", padx=41, pady=20, command=subtract)
button_equals = tk.Button(root, text="=", padx=91, pady=20, command=equals)
button_clear = tk.Button(root, text="Clear", padx=79, pady=20, command=clear_screen)

button_1.grid(row=2, column=0)
button_2.grid(row=2, column=1)
button_3.grid(row=2, column=2)
button_4.grid(row=2, column=3)
button_add.grid(row=3, column=0)
button_subtract.grid(row=4, column=0)
button_equals.grid(row=5, column=1, columnspan=2)
button_clear.grid(row=4, column=1, columnspan=2)

root.mainloop()

最后，你需要实现绘图功能。你可以使用matplotlib库来绘制函数图像。在父窗口添加一个“plot”按钮，单击该按钮时，打开一个子窗口，并在子窗口中绘制函数图像。

下面是一个示例代码，用于在子窗口中绘制sin函数的图像：

import tkinter as tk
import matplotlib.pyplot as plt
import numpy as np

def plot_function():
    fig = plt.figure()
    x = np.linspace(-np.pi, np.pi, 1000)
    y = np.sin(x)
    plt.plot(x, y)
    plt.show()

root = tk.Tk()
root.title("Calculator")

input_screen = tk.Entry(root, width=50, borderwidth=5)
input_screen.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

output_screen = tk.Entry(root, width=50, borderwidth=5)
output_screen.grid(row=1, column=0, columnspan=4, padx=10, pady=10)

button_1 = tk.Button(root, text="1", padx=40, pady=20, command=lambda:add_number(1))
button_2 = tk.Button(root, text="2", padx=40, pady=20, command=lambda:add_number(2))
button_3 = tk.Button(root, text="3", padx=40, pady=20, command=lambda:add_number(3))
button_4 = tk.Button(root, text="4", padx=40, pady=20, command=lambda:add_number(4))
button_add = tk.Button(root, text="+", padx=39, pady=20, command=add)
button_subtract = tk.Button(root, text="-", padx=41, pady=20, command=subtract)
button_equals = tk.Button(root, text="=", padx=91, pady=20, command=equals)
button_clear = tk.Button(root, text="Clear", padx=79, pady=20, command=clear_screen)
button_plot = tk.Button(root, text="Plot", padx=80, pady=20, command=plot_function)

button_1.grid(row=2, column=0)
button_2.grid(row=2, column=1)
button_3.grid(row=2, column=2)
button_4.grid(row=2, column=3)
button_add.grid(row=3, column=0)
button_subtract.grid(row=4, column=0)
button_equals.grid(row=5, column=1, columnspan=2)
button_clear.grid(row=4, column=1, columnspan=2)
button_plot.grid(row=3, column=2, columnspan=2)

root.mainloop()

希望这些示例代码对你有所帮助。请注意，这只是一个简单的示例，你需要根据你自己的需求进行修改和扩展。