Add method to retrieve a PlayQueue

plexapi/playqueue.py

@@ -66,6 +66,8 @@ def _loadData(self, data):
         self.selectedItem = self[self.playQueueSelectedItemOffset]
 
     def __getitem__(self, key):
+        if not self.items:
+            return None
         return self.items[key]
 
     def __len__(self):
@@ -93,6 +95,45 @@ def getQueueItem(self, item):
         else:
             raise BadRequest("{item} not valid for this PlayQueue".format(item=item))
 
+    @classmethod
+    def get(
+        cls,
+        server,
+        playQueueID,
+        own=False,
+        center=None,
+        window=50,
+        includeBefore=True,
+        includeAfter=True,
+    ):
+        """Retrieve an existing :class:`~plexapi.playqueue.PlayQueue` by identifier.
+
+        Parameters:
+            server (:class:`~plexapi.server.PlexServer`): Server you are connected to.
+            playQueueID (int): Identifier of an existing PlayQueue.
+            own (bool, optional): If server should transfer ownership.
+            center (int, optional): The playQueueItemID of the center of the window. Does not change selectedItem.
+            window (int, optional): Number of items to return from each side of the center item.
+            includeBefore (bool, optional):
+                Include items before the center, defaults True. Does not include center if False.
+            includeAfter (bool, optional):
+                Include items after the center, defaults True. Does not include center if False.
+        """
+        args = {
+            "own": utils.cast(int, own),
+            "window": window,
+            "includeBefore": utils.cast(int, includeBefore),
+            "includeAfter": utils.cast(int, includeAfter),
+        }
+        if center:
+            args["center"] = center
+
+        path = "/playQueues/{playQueueID}{args}".format(playQueueID=playQueueID, args=utils.joinArgs(args))
+        data = server.query(path, method=server._session.get)
+        c = cls(server, data, initpath=path)
+        c._server = server
+        return c
+
     @classmethod
     def create(
         cls,

tests/test_playqueue.py

@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 from plexapi.exceptions import BadRequest
+from plexapi.playqueue import PlayQueue
 import pytest
 
 
@@ -138,3 +139,11 @@ def test_create_playqueue_from_playlist(plex, album):
         assert len(pq) == 2 * len(playlist)
     finally:
         playlist.delete()
+
+
+def test_lookup_playqueue(plex, movie):
+    pq = PlayQueue.create(plex, movie)
+    pq_id = pq.playQueueID
+    pq2 = PlayQueue.get(plex, pq_id)
+    assert pq.playQueueID == pq2.playQueueID
+    assert pq.items == pq2.items