Python 3 PermissionError：[WinError 32]进程无法访问该文件，因为它正被另一个进程

Question

桌面上有两个文件夹。只要捕获的文件夹中只有一个文件，我想重命名（即剪切和粘贴）到Screenshots文件夹。 但是当我运行程序（任一目录中没有文件）并将一个文件粘贴到src（即Captured文件夹）时，它会抛出一条错误消息。我在这里缺少什么？

import os

dest= 'C:/Users/rajini raja/Desktop/Screenshots/'
src = 'C:/Users/rajini raja/Desktop/Captured/'

while True:
    if len(os.listdir(src)) == 1:
        os.rename(src + 'capture.png', dest + 'capture.png')
        break

错误消息显示为

Traceback (most recent call last):
  File "C:\Users\rajini raja\Desktop\os_rename.py", line 13, in <module> 
os.rename(src + 'capture.png', file_path + 'capture.png')
PermissionError: [WinError 32] The process cannot access the file because it 
is being used by another process: 'C:/Users/rajini 
raja/Desktop/Captured/capture.png' -> 'C:/Users/rajini 
raja/Desktop/Screenshots/capture.png'