Issue with downloading and executing a file: Python Windows 64bit

Question

I meet a weird error when downloading and executing a file in Windows 64 with the below code. The error is that I always get the access denied. Note that this code works fine in Linux and when I use Window Explorer to manually set full permissions to the file, I can execute it (I don't know why as my code already sets full permissions to the file).

#open url
u = urllib2.urlopen(download_url)

#create and write to a local file
with open(filename, 'wb') as f:
    block_sz = 8192
    while True:
        buffer = u.read(block_sz)
        if not buffer:
            break
        f.write(buffer)

#set full permission to the file
os.chmod(filename, stat.S_IRWXU | stat.S_IRWXG | stat.S_IRWXO)
os.system(filename)

Answer 1

根据文档 ， os.chmod只能在Windows系统上设置更改只读权限。

Answer 2

看来问题是由我的人偶配置引起的，而不是python引起的，因为在父目录中设置权限存在问题。