[SOLVED] Load and show an image from the web in Python with Gtk 3?

Load and show an image from the web in Python with Gtk 3?

I'm writing an app on Ubuntu 12.04 with Python and GTK 3. The problem I have is that I can't figure out how I should do to show a Gtk.Image in my app with an image file from the web.

This is as far as I have come:

from gi.repository import Gtk
from gi.repository.GdkPixbuf import Pixbuf
import urllib2

url = 'http://lolcat.com/images/lolcats/1338.jpg'
response = urllib2.urlopen(url)
image = Gtk.Image()
image.set_from_pixbuf(Pixbuf.new_from_stream(response))

I think everything is correct except the last line.

Solution

I haven't found any documentation on PixBuf. Therefore, I can't answer which arguments new_from_stream takes. For the record, the error message I was given was

TypeError: new_from_stream() takes exactly 2 arguments (1 given)

But I can give you a simple solution which might even improve your application. Saving the image to a temporary file includes caching.

from gi.repository import Gtk
from gi.repository.GdkPixbuf import Pixbuf
import urllib2

url = 'http://lolcat.com/images/lolcats/1338.jpg'
response = urllib2.urlopen(url)
fname = url.split("/")[-1]
f = open(fname, "wb")
f.write(response.read())
f.close()
response.close()
image = Gtk.Image()
image.set_from_pixbuf(Pixbuf.new_from_file(fname))

I'm aware it's not the cleanest code (URL could be malformed, resource opening could fail, ...) but it should be obvious whats's the idea behind.