How to use Python to implement the windows countdown lock screen function

Implementation ideas

1) Mainly introduces python to implement the windows countdown lock screen function

Python implements the windows countdown lock screen function

# 倒计时锁屏
import time
from ctypes import *
def closewindows(closetime):
while closetime>0:
print(closetime)
time.sleep(1)
closetime-=1
user32 = windll.LoadLibrary('user32.dll')
user32.LockWorkStation()
if __name__ == "__main__":
closewindows(3)

2) Expansion of knowledge points

Python code for windows lock screen

C:\Users\HAS>python
Python 3.6.4 (v3.6.4:d48eceb, Dec 19 2017, 06:54:40) [MSC v.1900 64 bit (AMD64)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from ctypes import *
>>> user32 = windll.LoadLibrary('user32.dll')
>>> user32.LockWorkStation()

3) Python implementation of countdown gadget

#!/usr/bin/env python
# coding=utf-8
import threading
import time
import Queue
from Tkinter import *
import tkMessageBox
import logging
logging.basicConfig(level=logging.INFO)
## Communication queue
commQueue = Queue.Queue()
g_time = 0
## Function run in thread
def timeThread():
global g_time
g_time = timeVar.get() * 60
while 1:
logging.info("线程放入队列:%d".decode("utf-8") % g_time)
commQueue.put(g_time)
try:
root.event_generate(&#39;<<TimeChanged>>&#39;, when=&#39;tail&#39;)
except TclError:
break
time.sleep(1)
g_time -= 1
if g_time==-1:
begin_btn["fg"] = "black"
clockVar.set("开始计时")
break
def timeChanged(event):
x = commQueue.get()
logging.info("获取队列:%d".decode("utf-8") % x)
minits = x//60
seconds = x%60
s = "剩余时间 {:02}:{:02}".format(minits, seconds)
begin_btn["fg"] = "blue"
clockVar.set(s)
if x==0:
tkMessageBox.showinfo("提醒","时间已到")
def clock_func(*args):
global g_time
if threading.activeCount()>1:
g_time = timeVar.get() * 60
else:
th=threading.Thread(target=timeThread)
th.start()
## Create main window
root = Tk()
root.title("计时工具")
root.geometry("180x95-0-45")
root.resizable(width=FALSE,height=FALSE)
root.wm_attributes("-topmost",1)
frame = Frame(root)
frame.pack()
Label(frame,text="设定时间间隔").grid(row=1,column=2)
timeVar = IntVar()
clockVar = StringVar()
time_entry = Entry(frame, textvariable=timeVar, width=8)
time_entry["justify"] = "center"
time_entry.grid(row=2,column=2,sticky="W,E")
begin_btn = Button(frame,textvariable=clockVar,command=clock_func)
begin_btn.grid(row=3,column=2)
timeVar.set(8)
begin_btn["fg"] = "black"
clockVar.set("开始计时")
for child in frame.winfo_children():
child.grid_configure(pady=3)
time_entry.focus()
root.bind(&#39;<<TimeChanged>>&#39;, timeChanged)
root.bind("<Return>",clock_func)
root.mainloop()

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