'except FileNotFoundError' instead of ENOENT check

qubes/app.py

@@ -22,7 +22,6 @@
 
 import collections
 import copy
-import errno
 import functools
 import grp
 import itertools
@@ -1008,8 +1007,8 @@ class Qubes(qubes.PropertyHolder):
             try:
                 fd = os.open(self._store,
                     os.O_RDWR | (os.O_CREAT * int(for_save)))
-            except OSError as e:
-                if not for_save and e.errno == errno.ENOENT:
+            except FileNotFoundError:
+                if not for_save:
                     raise qubes.exc.QubesException(
                         'Qubes XML store {!r} is missing; '
                         'use qubes-create tool'.format(self._store))

qubes/vm/qubesvm.py

@@ -24,7 +24,6 @@ from __future__ import absolute_import
 
 import asyncio
 import base64
-import errno
 import grp
 import os
 import os.path
@@ -1461,11 +1460,8 @@ class QubesVM(qubes.vm.mix.net.NetVMMixin, qubes.vm.BaseVM):
         try:
             # TODO: make it async?
             shutil.rmtree(self.dir_path)
-        except OSError as e:
-            if e.errno == errno.ENOENT:
-                pass
-            else:
-                raise
+        except FileNotFoundError:
+            pass
         yield from self.storage.remove()
 
     @asyncio.coroutine