Run pyupgrade.

contrib/graph/graph.py

@@ -23,7 +23,7 @@
 
 
 def make_name(pdu_id: str, origin: str) -> str:
-    return "%s@%s" % (pdu_id, origin)
+    return f"{pdu_id}@{origin}"
 
 
 def make_graph(pdus: List[dict], filename_prefix: str) -> None:
@@ -119,7 +119,7 @@ def make_graph(pdus: List[dict], filename_prefix: str) -> None:
 def get_pdus(host: str, room: str) -> List[dict]:
     transaction = json.loads(
         urllib.request.urlopen(
-            "http://%s/_matrix/federation/v1/context/%s/" % (host, room)
+            f"http://{host}/_matrix/federation/v1/context/{room}/"
         ).read()
     )
 

contrib/graph/graph2.py

@@ -112,7 +112,7 @@ def make_graph(db_name: str, room_id: str, file_prefix: str, limit: int) -> None
             try:
                 end_node = node_map[prev_id]
             except Exception:
-                end_node = pydot.Node(name=prev_id, label="<<b>%s</b>>" % (prev_id,))
+                end_node = pydot.Node(name=prev_id, label=f"<<b>{prev_id}</b>>")
 
                 node_map[prev_id] = end_node
                 graph.add_node(end_node)
@@ -124,7 +124,7 @@ def make_graph(db_name: str, room_id: str, file_prefix: str, limit: int) -> None
         if len(event_ids) <= 1:
             continue
 
-        cluster = pydot.Cluster(str(group), label="<State Group: %s>" % (str(group),))
+        cluster = pydot.Cluster(str(group), label=f"<State Group: {str(group)}>")
 
         for event_id in event_ids:
             cluster.add_node(node_map[event_id])

contrib/graph/graph3.py

@@ -115,7 +115,7 @@ def make_graph(file_name: str, file_prefix: str, limit: int) -> None:
             try:
                 end_node = node_map[prev_id]
             except Exception:
-                end_node = pydot.Node(name=prev_id, label="<<b>%s</b>>" % (prev_id,))
+                end_node = pydot.Node(name=prev_id, label=f"<<b>{prev_id}</b>>")
 
                 node_map[prev_id] = end_node
                 graph.add_node(end_node)