Fix issue with ModuleIndex when input contains only Obsoletes documents

Fix import issue when built with Python 2 support

Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>

0001-Add-missing-staticmethod-for-python2.patch

@@ -0,0 +1,31 @@
+From d8722735c4c5198a0a11ddaebf011034f677aa7f Mon Sep 17 00:00:00 2001
+From: Stephen Gallagher <sgallagh@redhat.com>
+Date: Mon, 11 Jan 2021 15:25:03 -0500
+Subject: [PATCH 1/2] Add missing @staticmethod for python2
+
+Fixes: https://github.com/fedora-modularity/libmodulemd/issues/537
+
+Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>
+---
+ bindings/python/gi/overrides/Modulemd.py | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/bindings/python/gi/overrides/Modulemd.py b/bindings/python/gi/overrides/Modulemd.py
+index 9e6d1c212e663c4d1392ce9c8d4ea66abbc9f7ac..23d5218cbe37c9d08f9d88debb541f6467b68404 100644
+--- a/bindings/python/gi/overrides/Modulemd.py
++++ b/bindings/python/gi/overrides/Modulemd.py
+@@ -26,10 +26,11 @@ Modulemd = get_introspection_module("Modulemd")
+ 
+ __all__ = []
+ 
+ 
+ class ModulemdUtil(object):
++    @staticmethod
+     def strip_gtype(method):
+         @functools.wraps(method)
+         def wrapped(*args, **kwargs):
+             ret = method(*args, **kwargs)
+             if len(ret) == 2:
+-- 
+2.29.2
+