我一直在做一个关于显微镜的项目，我正在开发一些函数当我试图将上像素和下像素颠倒过来的时候比如如果高度是1000 y值为50的像素会和y值为950的像素互换位置，所以对于这个函数我做了所以我给给予代码rn

# import the opencv library
import cv2
import tkinter as tk
import time

a = int(input("Choose which camera to use (Number) > "))
# define a video capture object
vid = cv2.VideoCapture(a)

width, height = int(input("Choose width (Max 1500) > ")), int(input("Choose height (Max 900) > "))

F1 = False
F2 = False

while True:
    # Capture the video frame
    liste = []
    liste2 = {"[0, 0, 0]": 0}
    maximum = []
    maxxx = ""
    ret, frame = vid.read()
    frame = cv2.resize(frame, (width, height))

    if F1:
        h, w, c = frame.shape
        for t in range(h):
            for y in range(w):
                for u in range(3):
                    frame[t][y][u] = 255 - frame[t][y][u]
    if F2:                   <--------------------------------- HERE
        frame = frame[::-1]

    # Display the resulting frame
    cv2.imshow('Video', frame)
    maxx = 0
    # Get the color that is the most on the screen
    if cv2.waitKey(1) & 0xFF == ord('r'):
        for a in range(width):
            for b in range(height):
                liste.append(str(frame[a, b]))
        for i in liste:
            if i in liste2:
                liste2[i] += 1
            elif not i in liste2:
                liste2.update({i: 1})
        for i in liste:
            if maxx < liste2[i]:
                maxx = liste2[i]
        for i in liste:
            if maxx == liste2[i] and not maxx in maximum:
                maxxx = i
        print(maxxx)

    # Invert Image Colors
    if cv2.waitKey(1) & 0xFF == ord('i'):
        if not F1:
            F1 = True
        if F1:
            F1 = False
        print(True)

    # Invert y pixels
    if cv2.waitKey(1) & 0xFF == ord('g'): # <------- HERE
        if not F2:
            F2 = True
        elif F2:
            F2 = False
        print(F2)

    #Quit
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
# After the loop release the cap object
vid.release()
# Destroy all the windows
cv2.destroyAllWindows()

所以，因为有一种游戏循环，所以当我按下g键时，我试图从反转切换到不反转，但当我这样做时，F2值（第一个布尔值<--这里）总是告诉我假。
我只是告诉它，但我试图使一个布尔值为True时，它是假的，我激活它，当它是假的，它是真的，但它总是假的