[PATCH 12/19] sepolicy: Simplify policy types detection

[Petr Lautrbach <plautrba@redhat.com>]

map() and filter() changed their return values from list to iterators in
Python 3. This change drops filter() and map() from gui.py to make it
work on Python 2 and 3

Fixes:
Traceback (most recent call last):
  File "/bin/sepolicy", line 700, in <module>
    args.func(args)
  File "/bin/sepolicy", line 326, in gui_run
    sepolicy.gui.SELinuxGui(args.domain, args.test)
  File "/usr/lib/python3.5/site-packages/sepolicy/gui.py", line 238, in __init__
    if self.populate_system_policy() < 2:
  File "/usr/lib/python3.5/site-packages/sepolicy/gui.py", line 835, in populate_system_policy
    types = map(lambda x: x[1], filter(lambda x: x[0] == selinux_path, os.walk(selinux_path)))[0]
TypeError: 'map' object is not subscriptable

Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
---
 python/sepolicy/sepolicy/gui.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/python/sepolicy/sepolicy/gui.py b/python/sepolicy/sepolicy/gui.py
index e361aa1c..8e86a369 100644
--- a/python/sepolicy/sepolicy/gui.py
+++ b/python/sepolicy/sepolicy/gui.py
@@ -831,8 +831,7 @@ class SELinuxGui():
             self.enforce_button = self.disabled_button_default
 
     def populate_system_policy(self):
-        selinux_path = selinux.selinux_path()
-        types = map(lambda x: x[1], filter(lambda x: x[0] == selinux_path, os.walk(selinux_path)))[0]
+        types = next(os.walk(selinux.selinux_path(), topdown=True))[1]
         types.sort()
         ctr = 0
         for item in types:
-- 
2.12.2