Port check-mir to Python 3

check-mir

@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 #
 # Check components of build dependencies and warn about universe/multiverse
 # ones, for a package destined for main/restricted
@@ -21,8 +21,6 @@
 # this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
-from __future__ import print_function
-
 import sys
 import optparse
 import os.path
@@ -103,7 +101,7 @@ def check_binary_dependencies(apt_cache, control):
     print('\nChecking support status of binary dependencies...')
     while True:
         try:
-            control.next()
+            next(control)
         except StopIteration:
             break
 
@@ -141,7 +139,7 @@ def main():
 
     # get build dependencies from debian/control
     control = apt.apt_pkg.TagFile(open('debian/control'))
-    control.next()
+    next(control)
 
     unsupported_build_deps = check_build_dependencies(apt_cache, control)
     unsupported_binary_deps = check_binary_dependencies(apt_cache, control)

debian/control

@@ -63,6 +63,7 @@ Depends:
  python-lazr.restfulclient,
  python-ubuntutools,
  python3,
+ python3-apt,
  python3-distro-info,
  python3-httplib2,
  python3-launchpadlib,

setup.py

@@ -19,6 +19,7 @@ if sys.version_info[0] >= 3:
     scripts = [
         'backportpackage',
         'bitesize',
+        'check-mir',
         'check-symbols',
         'dch-repeat',
         'grab-merge',
@@ -36,7 +37,6 @@ if sys.version_info[0] >= 3:
     ]
 else:
     scripts = [
-        'check-mir',
         'grep-merges',
         'hugdaylist',
         'import-bug-from-debian',