Align parsed() call with cmd2 versions >= 0.7.3queens-em2.11.1

In version 0.7.3, cmd2 moved the parsed method from class Cmd()
to class ParserManager().

Change-Id: Ie0c057ffaeaa05c4f5e0f3599aab850245c55066
Closes-Bug: #1751822

1 files changed, 7 insertions, 1 deletions

diff --git a/cliff/interactive.py b/cliff/interactive.py
index 74b5f54..68f7959 100644
--- a/cliff/interactive.py
+++ b/cliff/interactive.py
@@ -111,7 +111,13 @@ class InteractiveApp(cmd2.Cmd):
             # Dispatch to the underlying help command,
             # which knows how to provide help for extension
             # commands.
-            self.default(self.parsed('help ' + arg))
+            try:
+                # NOTE(coreycb): This try path can be removed once
+                # requirements.txt has cmd2 >= 0.7.3.
+                parsed = self.parsed
+            except AttributeError:
+                parsed = self.parser_manager.parsed
+            self.default(parsed('help ' + arg))
         else:
             cmd2.Cmd.do_help(self, arg)
             cmd_names = sorted([n for n, v in self.command_manager])