added image creation from public lxd server

pylxd/models/image.py

@@ -156,6 +156,32 @@ def create_from_simplestreams(cls, client, server, alias,
 
         return client.images.get(op.metadata['fingerprint'])
 
+    @classmethod
+    def create_from_image(cls, client, server, fingerprint=None, alias=None,
+                          public=False, auto_update=False, secret=None,
+                          certificate=None):
+        """Copy an image from remote lxd."""
+        config = {
+            'public': public,
+            'auto_update': auto_update,
+            'source': {
+                'type': 'image',
+                'mode': 'pull',
+                'server': server,
+                'protocol': 'lxd',
+                'fingerprint': fingerprint,
+                'alias': alias,
+                'secret': secret,
+                'certificate': certificate
+            }
+        }
+        if alias is not None:
+            config["aliases"] = [{'name': alias}]
+
+        op = _image_create_from_config(client, config, wait=True)
+
+        return client.images.get(op.metadata['fingerprint'])
+
     @classmethod
     def create_from_url(cls, client, url,
                         public=False, auto_update=False):

pylxd/tests/models/test_image.py

@@ -368,6 +368,17 @@ def test_create_from_simplestreams(self):
             image.fingerprint
         )
 
+    def test_create_from_image(self):
+        """Try to create an image from image at public lxd."""
+        image = self.client.images.create_from_image(
+            'https://images.nlogn.org:8443',
+            alias='debian/8'
+        )
+        self.assertEqual(
+            'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855',
+            image.fingerprint
+        )
+
     def test_create_from_url(self):
         """Try to create an image from an URL."""
         image = self.client.images.create_from_url(