Python+Tkinter绘制一个数字时钟

from tkinter import *
from time import strftime
root = Tk()
root.geometry('500x350+300+300')
root.iconbitmap('C:/Users/Administrator/Desktop/C语言中文网loGo.ico')
root.title("C语言中文网出品")
# 设置文本标签
lb = Label(root, font=("微软雅黑", 50, "bold"), bg='#87CEEB', fg="#B452CD")
lb.pack(anchor="center", fill="both", expand=1)
# 定义一个mode标志
mode = 'time'
# 定义显示时间的函数
def showtime():
    if mode == 'time':
        #时间格式化处理   
        string = strftime("%H:%M:%S %p")
    else:
        string = strftime("%Y-%m-%d")
    lb.config(text=string)
    # 每隔 1秒钟执行time函数
    lb.after(1000, showtime)
# 定义鼠标处理事件，点击时间切换为日期样式显示
def mouseClick(event):
    global mode
    if mode == 'time':
        # 点击切换mode样式为日期样式
        mode = 'date'
    else:
        mode = 'time'
lb.bind("<Button>", mouseClick)
# 调用showtime()函数
showtime()
# 显示窗口
mainloop()

# coding:utf-8
from tkinter import *
import math,time
def points():
 for i in range(1,13):
 x = 200 + 130*math.sin(2*math.pi*i/12)
 y = 200 - 130*math.cos(2*math.pi*i/12)
 canvas.create_text(x,y,text=i)

def createline(radius,line_width,rad):
 global List
 global i
 List = []
 x = 200+radius*math.sin(rad)
 y = 200-radius*math.cos(rad)
 i=canvas.create_line(200,200,x,y,width=line_width)
 List.append(i)

root = Tk()
root.resizable(0,0)
canvas = Canvas(root,width=400,height=500,bd=0,highlightthickness=0)
canvas.pack()
canvas.create_oval(50,50,350,350)
points()

while 1:
 tm=time.localtime()
 t=time.asctime(tm)
 t_hour=0
 if tm.tm_hour<=12:
 t_hour=tm_hour
 else:
 t_hour=tm.tm_hour-12
 rad1=2*math.pi*(t_hour+tm.tm_min/60)/12
 rad2=2*math.pi*(tm.tm_min+tm.tm_sec/60)/60
 rad3=2*math.pi*tm.tm_sec/60
 createline(50,6,rad1,)
 createline(90,3,rad2)
 createline(120,1,rad3)
 l=canvas.create_text(170,450,text=t)
 root.update()
 time.sleep(1)
 for item in List:
 canvas.delete(item)
 canvas.delete(l)

root.update()
mainloop()