Permission Denied To Write To My Temporary File

NamedTemporaryFile actually creates and opens the file for you, there's no need for you to open it again for writing.

In fact, the Python docs state:

Whether the name can be used to open the file a second time, while the named temporary file is still open, varies across platforms (it can be so used on Unix; it cannot on Windows NT or later).

That's why you're getting your permission error. What you're probably after is something like:

f = tempfile.NamedTemporaryFile(mode='w') # open filetemp = f.name                             # get name (if needed)

Use the delete parameter as below:

tmpf = NamedTemporaryFile(delete=False)

But then you need to manually delete the temporary file once you are done with it.

tmpf.close()os.unlink(tmpf.name)

Reference for bug: https://github.com/bravoserver/bravo/issues/111

regards,Vidyesh

Consider using os.path.join(tempfile.gettempdir(), os.urandom(24).hex()) instead. It's reliable, cross-platform, and the only caveat is that it doesn't work on FAT partitions.

NamedTemporaryFile has a number of issues, not the least of which is that it can fail to create files because of a permission error, fail to detect the permission error, and then loop millions of times, hanging your program and your filesystem.