介绍一些python中turtle.update()

turtle.update()是turtle图形库中的一个函数，用于刷新turtle窗口并显示新的绘图内容。它通常在程序中的循环中使用，以确保窗口更新并显示绘图。此函数还可用于在调整绘图时避免窗口闪烁。除update()外，还有一个函数是ontimer()，可用于在固定时间间隔内重复显示更新。

相关问题

import turtle, datetimedef drawGap(): #绘制数码管间隔 turtle.penup() turtle.fd(5)def drawLine(draw): #绘制单段数码管 drawGap() turtle.pendown() if draw elseturtle.penup() turtle.fd(40) drawGap() turtle.right(90)def drawDigit(d): #根据数字绘制七段数码管 drawLine(True) if d in[2,3,4,5,6,8,9] else drawLine(False) drawLine(True) if d in[0,1,3,4,5,6,7,8,9] else drawLine(False) drawLine(True) if d in[0,2,3,5,6,8,9] else drawLine(False) drawLine(True) if d in[0,2,6,8] else drawLine(False) turtle.left(90) drawLine(True) if d in[0,4,5,6,8,9] else drawLine(False) drawLine(True) if d in[0,2,3,5,6,7,8,9] else drawLine(False) drawLine(True) if d in[0,1,2,3,4,7,8,9] else drawLine(False) turtle.left(180) turtle.penup() turtle.fd(20)def drawDate(date): turtle.pencolor("red") for i in date: if i == '-': turtle.write('年',font=("Arial",18, "normal")) turtle.pencolor("green") turtle.fd(40) elif i == '=': turtle.write('月',font=("Arial",18, "normal")) turtle.pencolor("blue") turtle.fd(40) elif i == '+': turtle.write('日',font=("Arial",18, "normal")) else: drawDigit(eval(i))def main(): turtle.setup(800, 350, 200,200) turtle.penup() turtle.fd(-350) turtle.pensize(5) drawDate(datetime.datetime.now().strftime('%Y-%m=%d+')) turtle.hideturtle()main() 在上面代码的基础上，年月日改成年月日+时分秒后，实现时间的实时刷新。在上一题基础上，要求：（1）把年月日放在时分秒上面，如下所示： （2）把时间改成走马灯的循环移动方式。

好的，我明白了。针对你的问题，可以按照以下步骤进行修改：

1. 修改 drawDate 函数，将年月日+时分秒的字符串拆分成年月日和时分秒两部分，并分别调用 drawDigit 函数进行绘制。绘制时需要留出一定的间隔。

2. 实时更新时间，可以使用 Python 的 time 模块获取当前时间，并将其转换为字符串格式，再调用 turtle.clear() 函数清空画布，再重新绘制时间。

3. 实现走马灯效果，可以使用 turtle.tracer(0, 0) 函数关闭画布的自动刷新功能，然后手动调用 turtle.update() 函数进行刷新。同时，利用 turtle.ontimer() 函数定时调用更新时间的函数，从而实现循环移动的效果。

以下是修改后的代码：

python 下面八个块显示鼠标追踪位置turtle.canvas 重力四子棋 turtle 代码

1. 显示鼠标追踪位置：

import turtle

def track_mouse(x, y):
    turtle.goto(x, y)

turtle.onscreenclick(track_mouse)
turtle.mainloop()

2. turtle.canvas：

import turtle

turtle.getcanvas().postscript(file="canvas.eps")
turtle.mainloop()

3. 重力：

import turtle

GRAVITY = 0.1

class Ball(turtle.Turtle):

    def __init__(self, x, y, dx, dy, radius, color):
        super().__init__(shape="circle")
        self.penup()
        self.setposition(x, y)
        self.dx = dx
        self.dy = dy
        self.radius = radius
        self.color(color)

    def move(self):
        self.dy -= GRAVITY
        self.sety(self.ycor() + self.dy)
        self.setx(self.xcor() + self.dx)

class Game:

    def __init__(self):
        self.window = turtle.Screen()
        self.window.setup(800, 600)
        self.window.bgcolor("white")
        self.balls = []

    def add_ball(self, x, y, dx, dy, radius, color):
        ball = Ball(x, y, dx, dy, radius, color)
        self.balls.append(ball)

    def start(self):
        while True:
            for ball in self.balls:
                ball.move()
                if ball.ycor() - ball.radius < -300:
                    ball.dy = -ball.dy
                if ball.xcor() + ball.radius > 400 or ball.xcor() - ball.radius < -400:
                    ball.dx = -ball.dx

            self.window.update()

game = Game()
game.add_ball(0, 200, 0, 0, 30, "red")
game.add_ball(0, 0, 5, 0, 20, "blue")
game.add_ball(0, -200, -5, 0, 10, "green")
game.start()

4. 四子棋：

import turtle

class Board:

    def __init__(self):
        self.board = [[None for _ in range(7)] for _ in range(6)]

    def is_full(self):
        for row in self.board:
            for cell in row:
                if cell is None:
                    return False
        return True

    def is_winner(self, player):
        # Check rows
        for row in self.board:
            count = 0
            for cell in row:
                if cell == player:
                    count += 1
                    if count == 4:
                        return True
                else:
                    count = 0

        # Check columns
        for j in range(7):
            count = 0
            for i in range(6):
                if self.board[i][j] == player:
                    count += 1
                    if count == 4:
                        return True
                else:
                    count = 0

        # Check diagonals
        for i in range(3):
            for j in range(4):
                if (self.board[i][j] == player and self.board[i+1][j+1] == player and
                    self.board[i+2][j+2] == player and self.board[i+3][j+3] == player):
                    return True
        for i in range(3):
            for j in range(3, 7):
                if (self.board[i][j] == player and self.board[i+1][j-1] == player and
                    self.board[i+2][j-2] == player and self.board[i+3][j-3] == player):
                    return True

        return False

    def play(self, player, column):
        for i in range(5, -1, -1):
            if self.board[i][column] is None:
                self.board[i][column] = player
                return True
        return False

class Game:

    def __init__(self):
        self.window = turtle.Screen()
        self.window.setup(700, 600)
        self.window.bgcolor("white")
        self.board = Board()
        self.turn = "red"
        self.draw_board()
        self.window.onclick(self.play)

    def draw_board(self):
        pen = turtle.Turtle()
        pen.hideturtle()
        pen.speed(0)
        pen.penup()
        pen.setposition(-300, -250)
        pen.pendown()
        pen.pensize(3)
        for _ in range(2):
            pen.forward(600)
            pen.left(90)
            pen.forward(500)
            pen.left(90)
        pen.penup()
        pen.setposition(-280, -225)
        for column in range(7):
            pen.write(column, align="center", font=("Arial", 16, "normal"))
            pen.forward(80)
        pen.hideturtle()

    def play(self, x, y):
        column = int((x + 300) // 80)
        if self.board.play(self.turn, column):
            self.draw_piece(column)
            if self.board.is_winner(self.turn):
                self.window.onclick(None)
                turtle.color(self.turn)
                turtle.write(f"{self.turn.upper()} wins!", align="center", font=("Arial", 32, "bold"))
            elif self.board.is_full():
                self.window.onclick(None)
                turtle.write("Draw!", align="center", font=("Arial", 32, "bold"))
            else:
                self.turn = "yellow" if self.turn == "red" else "red"

    def draw_piece(self, column):
        pen = turtle.Turtle()
        pen.hideturtle()
        pen.penup()
        pen.color(self.turn)
        row = max([i for i, cell in enumerate(self.board.board) if cell[column] is None])
        pen.setposition(-240 + column * 80, -200 + row * 80)
        pen.pendown()
        pen.begin_fill()
        pen.circle(30)
        pen.end_fill()

game = Game()
turtle.mainloop()

5. turtle 代码：

import turtle

pen = turtle.Turtle()
pen.speed(0)
pen.hideturtle()

def draw_triangle(x, y, size, color):
    pen.penup()
    pen.setposition(x, y)
    pen.pendown()
    pen.color(color)
    pen.begin_fill()
    for _ in range(3):
        pen.forward(size)
        pen.left(120)
    pen.end_fill()

draw_triangle(-200, 0, 100, "red")
draw_triangle(0, 0, 100, "green")
draw_triangle(200, 0, 100, "blue")

turtle.mainloop()