python制作图形界面的画图代码

以下是一个简单的Python程序，使用tkinter库制作图形界面的画图：

from tkinter import *

class PaintApp:
    def __init__(self, master):
        self.master = master
        self.master.title("Paint App")
        self.master.geometry("500x500")
        self.master.config(bg="white")

        self.brush_size = 2
        self.brush_color = "black"

        self.canvas = Canvas(self.master, width=500, height=500, bg="white")
        self.canvas.pack()

        self.canvas.bind("<B1-Motion>", self.draw)

        self.controls()

    def draw(self, event):
        x1, y1 = (event.x - self.brush_size), (event.y - self.brush_size)
        x2, y2 = (event.x + self.brush_size), (event.y + self.brush_size)
        self.canvas.create_oval(x1, y1, x2, y2, fill=self.brush_color, outline=self.brush_color)

    def change_brush_size(self, size):
        self.brush_size = size

    def change_brush_color(self, color):
        self.brush_color = color

    def controls(self):
        brush_size_label = Label(self.master, text="Brush Size:", font=("Arial", 12), bg="white")
        brush_size_label.place(x=10, y=10)

        size_1_button = Button(self.master, text="1", width=3, command=lambda: self.change_brush_size(1))
        size_1_button.place(x=100, y=10)

        size_2_button = Button(self.master, text="2", width=3, command=lambda: self.change_brush_size(2))
        size_2_button.place(x=130, y=10)

        size_3_button = Button(self.master, text="3", width=3, command=lambda: self.change_brush_size(3))
        size_3_button.place(x=160, y=10)

        brush_color_label = Label(self.master, text="Brush Color:", font=("Arial", 12), bg="white")
        brush_color_label.place(x=10, y=40)

        color_red_button = Button(self.master, text="Red", width=5, bg="red", command=lambda: self.change_brush_color("red"))
        color_red_button.place(x=100, y=40)

        color_green_button = Button(self.master, text="Green", width=5, bg="green", command=lambda: self.change_brush_color("green"))
        color_green_button.place(x=155, y=40)

        color_blue_button = Button(self.master, text="Blue", width=5, bg="blue", command=lambda: self.change_brush_color("blue"))
        color_blue_button.place(x=210, y=40)

root = Tk()
PaintApp(root)
root.mainloop()

该程序创建一个画布和一些控件，允许用户选择画笔大小和颜色，并在画布上绘制。控件使用Button和Label部件，可以根据需要进行扩展和更改。