PermissionError: [WinError 32] The process cannot access the file because it is being used by another process

[chankruze]

While decrypting Realme X (RMX1901_11_F.02) firmware, I encountered below error:

D:\lab\REALME>python oppo_ozip_decrypt\ozipdecrypt.py RMX1901EX_11_OTA_10200270_all_236N4HwASEdD.ozip
ozipdecrypt 1.31 (c) B.Kerler 2017-2021
"There is no item named 'oppo_metadata' in the archive"
Detected mode 2....
Finding key...  RMX1901EX_11_OTA_10200270_all_236N4HwASEdD.ozip
Unknown mode2, boot.img wasn't encrypted
Extracting...  RMX1901EX_11_OTA_10200270_all_236N4HwASEdD.ozip
Traceback (most recent call last):
  File "D:\lab\REALME\oppo_ozip_decrypt\ozipdecrypt.py", line 258, in main
    if zo.extract('oppo_metadata', outpath):
  File "C:\Users\chankruze\AppData\Local\Programs\Python\Python39\lib\zipfile.py", line 1616, in extract
    return self._extract_member(member, path, pwd)
  File "C:\Users\chankruze\AppData\Local\Programs\Python\Python39\lib\zipfile.py", line 1655, in _extract_member
    member = self.getinfo(member)
  File "C:\Users\chankruze\AppData\Local\Programs\Python\Python39\lib\zipfile.py", line 1429, in getinfo
    raise KeyError(
KeyError: "There is no item named 'oppo_metadata' in the archive"

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "D:\lab\REALME\oppo_ozip_decrypt\ozipdecrypt.py", line 317, in <module>
    sys.exit(main(args.filename))
  File "D:\lab\REALME\oppo_ozip_decrypt\ozipdecrypt.py", line 265, in main
    return mode2(filename)
  File "D:\lab\REALME\oppo_ozip_decrypt\ozipdecrypt.py", line 208, in mode2
    os.remove(os.path.join(temp,"out"))
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'D:\\lab\\REALME\\temp\\out'

Then I commented out line no 208 as shown below:

After that it worked.

D:\lab\REALME>python oppo_ozip_decrypt\ozipdecrypt.py RMX1901EX_11_OTA_10200270_all_236N4HwASEdD.ozip
ozipdecrypt 1.31 (c) B.Kerler 2017-2021
"There is no item named 'oppo_metadata' in the archive"
Detected mode 2....
Finding key...  RMX1901EX_11_OTA_10200270_all_236N4HwASEdD.ozip
Unknown mode2, boot.img wasn't encrypted
Extracting...  RMX1901EX_11_OTA_10200270_all_236N4HwASEdD.ozip
DONE... file decrypted to: D:\lab\REALME\RMX1901EX_11_OTA_10200270_all_236N4HwASEdD.zip

I believe that with open can be improved (It was very late in the morning so I had no patience to look the code). Another suggestion is to use snake case naming scheme if possible, it looks like more like C code.