在python中註冊屏幕更改？

Question

所以使用tkinter我做了一個簡單的程序，它將畫布上所有形狀的顏色每秒都變爲隨機顏色，我正在尋找的是註冊每個畫面變化並記錄畫面之間時間的方法如果可能的話，我還需要在沒有太多外部庫的幫助下做到這一點。

我迄今爲止代碼：

#!/usr/bin/python -W ignore::DeprecationWarning 
import Tkinter 
import tkMessageBox 
import time 
import random 


colors = ['DarkOrchid1','chocolate3','gold2','khaki2','chartreuse2','deep pink','white','grey','orange'] 
top = Tkinter.Tk() 
global b 
b=0 
C = Tkinter.Canvas(top, bg="blue", height=600, width=800) 
bcg1=C.create_rectangle(0,0,800,100,fill=random.choice(colors)) 
bcg2=C.create_rectangle(0,100,800,200,fill=random.choice(colors)) 
bcg3=C.create_rectangle(0,200,800,300,fill=random.choice(colors)) 
bcg4=C.create_rectangle(0,300,800,400,fill=random.choice(colors)) 
bcg5=C.create_rectangle(0,400,800,500,fill=random.choice(colors)) 
bcg6=C.create_rectangle(0,500,800,600,fill=random.choice(colors)) 
bcgs=[bcg1,bcg2,bcg3,bcg4,bcg5,bcg6] 
coord = 10, 50, 240, 210 
rect1=C.create_rectangle(0,0,100,100,fill="green") 
rect2=C.create_rectangle(700,500,800,600,fill="green") 
rect3=C.create_rectangle(0,500,100,600,fill="green") 
rect4=C.create_rectangle(700,0,800,100,fill="green") 
def color(): 
    global b 
    global bcgs 
    global color 
    if b==0: 
     C.itemconfig(rect1,fill='green') 
     C.itemconfig(rect2,fill='green') 
     C.itemconfig(rect3,fill='green') 
     C.itemconfig(rect4,fill='green') 
     b=1 
     count=0 
     for i in range(len(bcgs)): 
      C.itemconfig(bcgs[i],fill=random.choice(colors)) 

    elif b==1: 
     C.itemconfig(rect1,fill='red') 
     C.itemconfig(rect2,fill='red') 
     C.itemconfig(rect3,fill='red') 
     C.itemconfig(rect4,fill='red') 
     b=0 
     for i in range(len(bcgs)): 
      C.itemconfig(bcgs[i],fill=random.choice(colors)) 


    top.after(2000, color) 

C.pack() 
color() 
top.mainloop() 

Answer 1

除非你使用一個實時操作系統，你將永遠不會得到完美的時機。你可以在離商標幾毫秒的時候存款。要看多少，你可以計算出time.time()的差異。爲獲得最佳準確度，請將after調用移至該函數中的第一件事。

那加上其他一些改進：

#!/usr/bin/python -W ignore::DeprecationWarning 
import Tkinter 
import time 
import random 
from itertools import cycle 

colors = ['DarkOrchid1','chocolate3','gold2','khaki2','chartreuse2','deep pink','white','grey','orange'] 
rect_colors = cycle(['green', 'red']) 

top = Tkinter.Tk() 
C = Tkinter.Canvas(top, bg="blue", height=600, width=800) 
bcg1=C.create_rectangle(0,0,800,100,fill=random.choice(colors)) 
bcg2=C.create_rectangle(0,100,800,200,fill=random.choice(colors)) 
bcg3=C.create_rectangle(0,200,800,300,fill=random.choice(colors)) 
bcg4=C.create_rectangle(0,300,800,400,fill=random.choice(colors)) 
bcg5=C.create_rectangle(0,400,800,500,fill=random.choice(colors)) 
bcg6=C.create_rectangle(0,500,800,600,fill=random.choice(colors)) 
bcgs=[bcg1,bcg2,bcg3,bcg4,bcg5,bcg6] 
coord = 10, 50, 240, 210 
rect1=C.create_rectangle(0,0,100,100,fill="green") 
rect2=C.create_rectangle(700,500,800,600,fill="green") 
rect3=C.create_rectangle(0,500,100,600,fill="green") 
rect4=C.create_rectangle(700,0,800,100,fill="green") 
rects = [rect1,rect2,rect3,rect4] 

last_time = time.time() 
def color(): 
    top.after(2000, color) 
    global last_time 

    rect_color = next(rect_colors) 
    for item in rects: 
     C.itemconfig(item, fill=rect_color) 
    for item in bcgs: 
     C.itemconfig(item, fill=random.choice(colors)) 

    print("{} seconds since the last run".format(time.time() - last_time)) 
    last_time = time.time() 

C.pack() 
color() 
top.mainloop()