Merge PR #29095 into master

* refs/pull/29095/head:
	script/ptl-tool: update for python3

Reviewed-by: Sage Weil <sage@redhat.com>

src/script/ptl-tool.py

@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/python3
 
 # README:
 #
@@ -215,8 +215,8 @@ def build_branch(args):
         log.info("Detaching HEAD onto base: {}".format(base))
         try:
             base_path = args.base_path + base
-            base = filter(lambda r: r.path == base_path, G.refs)[0]
-        except IndexError:
+            base = next(ref for ref in G.refs if ref.path == base_path)
+        except StopIteration:
             log.error("Branch " + base + " does not exist!")
             sys.exit(1)