Python tempfile 模块的临时目录问题

Question

So I have created the following function which takes an image the user chooses from the tkinter file browser, opens it, re-saves it as a .gif (which is required ) in a temporary directory , and then sets it as the background of the tkinter canvas:

def background():
   # Create temporary directory and return path as 'tmp'
   tmp = tempfile.mkdtemp()
   # Ask user for image file
   cng = filedialog.askopenfilename()
   # Open the image using the PIL's `open` function
   img = Image.open(cng)
   # Supposed to save image to the `tmp` directory as a GIF
   img.save(tmp + cng + '.gif', 'GIF')
   # Supposed to set image file from temporary directory as background picture
   bgpic(tmp + cng + '.gif')

However, whenever the above code is run, I get the following error:

FileNotFoundError: [Errno 2] No such file or directory: 'var/folders/g_/099nlyhn51gf_sy21gvcp2fc0000gn/T/tmpj2z501ml/Users/Name/Pictures/ImageName.jpg.gif'

Apparently the directory cannot be found even though I created it with temple.mkdtemp() . What am I doing wrong here that is causing this error? Any help is greatly appreciated! :)

Answer 1

You appear to be trying to append the entire path to the file onto the temprary directory (so instead of /path/to/tmpdir/ImageName.jpg.gif , you're using /path/to/tmpdir/Users/Name/Pictures/ImageName.jpg.gif .

You didn't specify on which line the error is happening, but I suspect you're getting an error when trying to save the file, because those intervening directories don't exist.

Consider just taking the basename of the file:

img.save(os.path.join(tmp, os.path.basename(cng) + '.gif'), 'GIF')