python之time模块

Time

首先来一段简单一点的，额，要不就先来看看time.sleep()？

import time
count = 1
tag = True
name = 'script'
pwd = '123'
while tag:
    if count == 4:
        print('Too many time!')
        break
    username = input('Please enter your username:').strip()
    password = input('Please enter your password:')
    if not username:
        print('again!')
        continue
    elif not password:
        print('gaain')
        continue
    if username == name and password == pwd:
        print('Login successfully!')

        while tag:
            user_cmd = input('Please enter you order:'.strip())
            if user_cmd == 'q':
                tag = False
                break
            print('You type in thr command %s' % user_cmd)
    else:
        print('The user name or password you entered is incorrect,please re-enter.')
        print('You only have %s chance' % (3-count))
    count += 1
print(['5秒后结束，再见！'])

time.sleep(5)  # 也就是上面所述，让程序过了5秒后再结束

那么问题来了，为什么后面要来一个5秒后结束，那为什么不整一个过了一秒打印一次，最后到了5秒后结束呢？

哈哈，不好意思，我说我不会写，（我觉得这是一个值得让人思考的问题，也就没有写上去了，因为有了想法才有动力）

那我们来做一个简单的钟表吧

import threading,time

global t
def sayHello():
    print(time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())))

    t = threading.Timer(1.0,sayHello)
    t.start()
sayHello()

有很多的缺陷在里面，但是也是个不错的问题，值得让人去深究

然后我想到用Tkinter去实现时钟

import Tkinter,sys,time
root=Tkinter.Tk()
root.minsize(500, 500)
Label1=Tkinter.Label(text=time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())))
Label1.pack()
def trickit():
    currentTime=time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))
    Label1.config(text=currentTime)
    root.update()
    Label1.after(1000, trickit)
Label1.after(1000, trickit)

root.mainloop()

通过Tkinter制作windows窗口界面，然后去实现一个简单的倒计时功能

from Tkinter import *
import time
import tkMessageBox
 
class App:
    def __init__(self,master):
        frame = Frame(master)
        frame.pack()
        self.entryWidget = Entry(frame)
        self.entryWidget["width"] = 15
        self.entryWidget.pack(side=LEFT)
        self.hi_there = Button(frame, text="Start", command=self.start)
        self.hi_there.pack(side=LEFT)
        self.button = Button(frame, text="QUIT", fg="red", command=frame.quit)
        self.button.pack(side=LEFT)
         
    def start(self):
        text = self.entryWidget.get().strip()
        if text != "":
            num = int(text)
            self.countDown(num)
         
    def countDown(self,seconds):
        lbl1.config(bg='yellow')
        lbl1.config(height=3, font=('times', 20, 'bold'))
        for k in range(seconds, 0, -1):
            lbl1["text"] = k
            root.update()
            time.sleep(1)
        lbl1.config(bg='red')
        lbl1.config(fg='white')
        lbl1["text"] = "Time up!"
        tkMessageBox.showinfo("Time up!","Time up!")
 
    def GetSource():
        get_window = Tkinter.Toplevel(root)
        get_window.title('Source File?')
        Tkinter.Entry(get_window, width=30,
                      textvariable=source).pack()
        Tkinter.Button(get_window, text="Change",
                       command=lambda: update_specs()).pack()
  
root = Tk()
root.title("Countdown")
lbl1 = Label()
lbl1.pack(fill=BOTH, expand=1)
app = App(root)
root.mainloop()
#该代码片段来自于: http://www.sharejs.com/codes/python/7826

我那时候就出了很多问题，但是具体在哪出的，我也不得而知了
下面是包的问题

在python下ModuleNotFoundError: No module named 'Tkinter'问题的总结：

转载：https://blog.csdn.net/blueheart20/article/details/78763208

具体是个什么情况，我想还是得具体分析了，