如何在摄像头视频流上显示变量值？(python OpenCV)

import cv2
import numpy as np

def draw_text(frame, text, position):
    cv2.putText(frame, text, position, cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 255, 0), 2, cv2.LINE_AA)

cap = cv2.VideoCapture(0)

while True:
    ret, frame = cap.read()
    
    # 在视频帧上绘制变量值
    variable_value = 10  # 替换为你的变量值
    draw_text(frame, f"Variable: {variable_value}", (10, 30))
    
    cv2.imshow('Video', frame)
    
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()