ImageGrab.grab() 的时序 function

Question

I want to take screenshot of my computer. So I use ImageGrab.grab() function.

But, when I take screenshot, the timing was little bit fast than what I want.
As you can see in below picture I use print() function before and after.

But the result dosen't show any of those like below.

How can I get the right timing?
Thanks for your help!!

And I use python 3.6

import numpy as np
from PIL import ImageGrab
import matplotlib.pyplot as plt

if __name__ == "__main__" :
    print("want to capture this text")
    image = np.array(ImageGrab.grab(bbox=(0, 0, 1920, 1080)))
    print("don't want to capture this text")

    plt.figure()
    plt.imshow(image)
    plt.colorbar()
    plt.grid(False)
    plt.show()

Answer 1

Try to flush the print statement like this:

print("I want to see this", flush=True)

The output of the print statements are not printed out immediately. The flush should force it to be written out before continuing.