[Python知识库]用Python画一个时钟---简易版

既然是画时钟,那必不可少的就是turtle和datetime模块了,以上都是自带模块不需要下载

首先我们让钟能悬空移动

def move(distance):
	turtle.penup()
	turtle.forward(distance)
	turtle.pendown()

再创建表针turtle

def createHand(name, length):
	turtle.reset()
	move(-length * 0.01)
	turtle.begin_poly()
	turtle.forward(length * 1.01)
	turtle.end_poly()
	hand = turtle.get_poly()
	turtle.register_shape(name, hand)

最后再创建时钟

def createClock(radius):
	turtle.reset()
	turtle.pensize(7)
	for i in range(60):
		move(radius)
		if i % 5 == 0:
			turtle.forward(20)
			move(-radius-20)
		else:
			turtle.dot(5)
			move(-radius)
		turtle.right(6)

至此主体部分差不多完成了,现在我们要为这个时钟添加细节,例如获取今天的日期;今天是星期几;动态显示表针之类的.

最后我们来定义运行时钟这个函数

def start():
	# 不显示绘制时钟的过程
	turtle.tracer(False)
	turtle.mode('logo')
	createHand('second_hand', 150)
	createHand('minute_hand', 125)
	createHand('hour_hand', 85)
	# 秒, 分, 时
	second_hand = turtle.Turtle()
	second_hand.shape('second_hand')
	minute_hand = turtle.Turtle()
	minute_hand.shape('minute_hand')
	hour_hand = turtle.Turtle()
	hour_hand.shape('hour_hand')
	for hand in [second_hand, minute_hand, hour_hand]:
		hand.shapesize(1, 1, 3)
		hand.speed(0)
	# 用于打印日期等文字
	printer = turtle.Turtle()
	printer.hideturtle()
	printer.penup()
	createClock(160)
	# 开始显示轨迹
	turtle.tracer(True)
	startTick(second_hand, minute_hand, hour_hand, printer)
	turtle.mainloop()

我们以主窗口来运行它

if __name__ == '__main__':
	start()

我把源码放在了下面,有需要的自取,记得三联