Tkinter更改数据

Question

我想更改数据，只是将某些像素切换为白色或黑色，但我没有得到它的工作，我可以更改数据？当我使用行np.roll（）时，它会滚动图像并更新它，但是当我使用任何其他方法简单地更改数据数组的值时，我失败了？

我该怎么做，我错了什么？

import Tkinter 
from PIL import Image, ImageTk 
import numpy 
import time 

times=1 
timestart=time.clock() 
data=numpy.array(numpy.random.random((68,68))*100,dtype=int) 
#data = numpy.zeros([68,68]) 
photo = None 
sw = 1 

def image_loop(): 
     global data 
     global times 
     global timestart 
     global photo 

     im=Image.fromstring('L', (data.shape[1],data.shape[0]), data.astype('b').tostring()) 
     photo = ImageTk.PhotoImage(image=im) 
     canvas.create_image(0,0,image=photo,anchor=Tkinter.NW) 
     root.update() 
     times+=1 
     if times%33==0: 
       print "%.02f FPS"%(times/(time.clock()-timestart)) 

     root.after(100,image_loop) 
     ### THE next line WORKS, why not the others ??????? 
     #data=numpy.roll(data,-1,1) 


     ### Does not work ?? 
     global sw 
     if sw == 0: 
       for i in range(68): 
         data[10][i] * 100 
         #data = numpy.array(numpy.zeros(68,68)) 
       sw = 1 
       print "hi" 
     else: 
       sw = 0 
       for i in range(68): 
         data[10][i]/100 
         data = numpy.array(numpy.ones(68,68)) 
         #data = data * 100 
       print "ho" 



root = Tkinter.Tk() 
frame = Tkinter.Frame(root, width=68, height=68) 
frame.pack() 
canvas = Tkinter.Canvas(frame, width=68,height=68) 
canvas.place(x=-2,y=-2) 

root.after(0,image_loop) # INCREASE THE 0 TO SLOW IT DOWN 
#root.mainloop() 

while True: 
     print "do work again and again, change data" 
     root.update() 
     root.update_idletasks() 


     print data.shape 

Answer 1

事情是在初始化时不随机地初始化数据变量。此代码适用于95帧每秒

import Tkinter 
from PIL import Image, ImageTk 
import numpy 
import time 

times=1 
timestart=time.clock() 
data = None 
photo = None 

sw = 1 

def image_loop(): 
     global data 
     global times 
     global timestart 
     global photo 

     im=Image.fromstring('L', (data.shape[1],data.shape[0]), data.astype('b').tostring()) 
     photo = ImageTk.PhotoImage(image=im) 
     canvas.create_image(0,0,image=photo,anchor=Tkinter.NW) 
     root.update() 
     times+=1 
     if times%33==0: 
       print "%.02f FPS"%(times/(time.clock()-timestart)) 

     root.after(10,image_loop) 



root = Tkinter.Tk() 
frame = Tkinter.Frame(root, width=68, height=68) 
frame.pack() 
canvas = Tkinter.Canvas(frame, width=68,height=68) 
canvas.place(x=-2,y=-2) 

root.after(0,image_loop) 

data=numpy.array(numpy.random.random((68,68))*100,dtype=int) 


while True: 
     #print "do work again and again, change data" 
     root.update() 
     root.update_idletasks() 

     global sw 
     if sw == 0: 
       for i in range(68): 
         data[10][i] = 250 
       sw = 1 
     else: 
       sw = 0 
       for i in range(68): 
         data[10][i] = 0 
"plot.py" 58L, 1190C                                          1,1   Top