qubes: misc pylint fixes

qubes/tests/int/tools/qubes_create.py

@@ -29,7 +29,8 @@ import qubes.tools.qubes_create
 import qubes.tests
 
 @qubes.tests.skipUnlessDom0
-class TC_00_qubes_create(qubes.tests.SystemTestsMixin, qubes.tests.QubesTestCase):
+class TC_00_qubes_create(
+        qubes.tests.SystemTestsMixin, qubes.tests.QubesTestCase):
     def test_000_basic(self):
         self.assertEqual(0, qubes.tools.qubes_create.main((
             '--qubesxml', qubes.tests.XMLPATH)))

qubes/tests/int/tools/qvm_run.py

@@ -132,9 +132,10 @@ class TC_00_qvm_run(qubes.tests.SystemTestsMixin, qubes.tests.QubesTestCase):
             self.sharedopts + ['--filter-escape-chars', self.vm1.name,
                 r'printf \\033']))
 
-    @unittest.skip('test not implemented')
-    def test_007_gui(self):
-        raise NotImplementedError()
+
+    def test_007_gui(self): # pylint: disable=no-self-use
+        raise unittest.SkipTest('test not implemented')
+
 
 #parser.add_argument('--gui',
 #parser.add_argument('--no-gui', '--nogui',

qubes/tests/vm/qubesvm.py

@@ -116,7 +116,7 @@ class TC_90_QubesVM(qubes.tests.QubesTestCase):
         self.app = qubes.tests.vm.TestApp()
 
     def test_000_init(self):
-        vm = qubes.vm.qubesvm.QubesVM(self.app, None,
+        qubes.vm.qubesvm.QubesVM(self.app, None,
             qid=1, name=qubes.tests.VMPREFIX + 'test')
 
     def test_001_init_no_qid_or_name(self):
@@ -131,8 +131,8 @@ class TC_90_QubesVM(qubes.tests.QubesTestCase):
         class TestVM2(qubes.vm.qubesvm.QubesVM):
             event_fired = False
             @qubes.events.handler('domain-init')
-            def on_domain_init(self, event):
+            def on_domain_init(self, event): # pylint: disable=unused-argument
                 self.__class__.event_fired = True
 
-        vm = TestVM2(self.app, None, qid=1, name=qubes.tests.VMPREFIX + 'test')
+        TestVM2(self.app, None, qid=1, name=qubes.tests.VMPREFIX + 'test')
         self.assertTrue(TestVM2.event_fired)

qubes/tools/__init__.py

@@ -29,6 +29,7 @@ import argparse
 import importlib
 import logging
 import os
+import textwrap
 
 import qubes.log
 
@@ -107,7 +108,7 @@ class HelpPropertiesAction(argparse.Action):
             help=help)
 
         # late import because of circular dependency
-        import qubes
+        import qubes # pylint: disable=redefined-outer-name
         self._klass = klass if klass is not None else qubes.Qubes
 
 

qubes/tools/qubes_prefs.py

@@ -26,9 +26,7 @@
 
 from __future__ import print_function
 
-import argparse
 import sys
-import textwrap
 
 import qubes
 import qubes.tools

qubes/tools/qvm_prefs.py

@@ -26,9 +26,7 @@
 
 from __future__ import print_function
 
-import argparse
 import sys
-import textwrap
 
 import qubes
 import qubes.tools

qubes/tools/qvm_run.py

@@ -78,17 +78,6 @@ parser.add_argument('--no-filter-escape-chars',
 parser.add_argument('cmd', metavar='COMMAND',
     help='command to run')
 
-#
-#   parser.add_option ("-q", "--quiet", action="store_false", dest="verbose", default=True)
-#   parser.add_option ("--tray", action="store_true", dest="tray", default=False,
-#                      help="Use tray notifications instead of stdout" )
-#   parser.add_option ("--pause", action="store_true", dest="pause", default=False,
-#                     help="Do 'xl pause' for the VM(s) (can be combined this with --all)")
-#   parser.add_option ("--unpause", action="store_true", dest="unpause", default=False,
-#                     help="Do 'xl unpause' for the VM(s) (can be combined this with --all)")
-#   parser.add_option ("--nogui", action="store_false", dest="gui", default=True,
-#                     help="Run command without gui")
-##
 
 def main(args=None):
     args = parser.parse_args(args)

qubes/vm/qubesvm.py

@@ -664,9 +664,9 @@ class QubesVM(qubes.vm.BaseVM):
                 ['sudo', qubes.config.system_path['qubes_pciback_cmd'], pci])
             subprocess.check_call(
                 ['sudo', 'xl', 'pci-attach', str(self.xid), pci])
-        except Exception as e:
-            print >>sys.stderr, "Failed to attach PCI device on the fly " \
-                "(%s), changes will be seen after VM restart" % str(e)
+        except subprocess.CalledProcessError as e:
+            self.log.exception('Failed to attach PCI device {!r} on the fly,'
+                ' changes will be seen after VM restart.'.format(pci), e)
 
 
     @qubes.events.handler('device-pre-detached:pci')
@@ -690,9 +690,9 @@ class QubesVM(qubes.vm.BaseVM):
                 user="root", input="00:%s" % vmdev)
             subprocess.check_call(
                 ['sudo', 'xl', 'pci-detach', str(self.xid), pci])
-        except Exception as e:
-            print >>sys.stderr, "Failed to detach PCI device on the fly " \
-                "(%s), changes will be seen after VM restart" % str(e)
+        except subprocess.CalledProcessError as e:
+            self.log.exception('Failed to detach PCI device {!r} on the fly,'
+                ' changes will be seen after VM restart.'.format(pci), e)
 
 
     #
@@ -936,7 +936,7 @@ class QubesVM(qubes.vm.BaseVM):
 
         call_kwargs = {}
         if ignore_stderr or not passio:
-            null = open("/dev/null", "rw")
+            null = open("/dev/null", "r+")
             call_kwargs['stderr'] = null
         if not passio:
             call_kwargs['stdin'] = null