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Pino Toscano

2020-Jan-10 14:28 UTC

[Libguestfs] [PATCH 0/7] Various Python pycodestyle fixes

Fixes the majority of the pycodestyle issues in the Python bindings,
leaving only an overly length line in setup.py.

Add a simple optional pycodestyle-based test to avoid regressions in the
future.

Pino Toscano (7):
  python: PEP 8: adapt empty lines
  python: PEP 8: adapt whitespaces in lines
  python: tests: catch specific exception
  python: tests: improve variable naming
  python: tests: remove unused imports
  python: improve errors in inspect_vm example
  python: add a pycodestyle test

 config.sh.in                        |  1 +
 generator/python.ml                 |  5 ++---
 m4/guestfs-python.m4                |  3 +++
 python/Makefile.am                  |  5 +++++
 python/examples/inspect_vm.py       |  7 +++++--
 python/t/test020Create.py           |  1 +
 python/t/test030CreateFlags.py      |  3 ++-
 python/t/test040CreateMultiple.py   |  2 ++
 python/t/test050HandleProperties.py |  1 +
 python/t/test070OptArgs.py          |  1 -
 python/t/test080Version.py          |  2 --
 python/t/test090RetValues.py        | 10 +++++-----
 python/t/test100Launch.py           |  1 -
 python/t/test410CloseEvent.py       |  1 -
 python/t/test420LogMessages.py      |  1 -
 python/t/test430ProgressMessages.py |  3 ++-
 python/t/test800ExplicitClose.py    |  1 -
 python/t/test820RHBZ912499.py       |  3 +--
 python/t/test910Libvirt.py          |  1 -
 python/t/tests_helper.py.in         |  2 +-
 python/test-pycodestyle.sh          | 30 +++++++++++++++++++++++++++++
 21 files changed, 61 insertions(+), 23 deletions(-)
 create mode 100755 python/test-pycodestyle.sh

-- 
2.24.1

Pino Toscano

2020-Jan-10 14:28 UTC

head link

[Libguestfs] [PATCH 1/7] python: PEP 8: adapt empty lines

Add or remove empty lines to match the needed ones around
blocks/functions/etc.

Adapt the generation of guestfs.py to emit the separating empty line
before adding a new function/alias, rather than after it.

This is just formatting, no behaviour changes.
---
 generator/python.ml                 | 5 ++---
 python/t/test020Create.py           | 1 +
 python/t/test030CreateFlags.py      | 1 +
 python/t/test040CreateMultiple.py   | 2 ++
 python/t/test050HandleProperties.py | 1 +
 python/t/test430ProgressMessages.py | 2 ++
 6 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/generator/python.ml b/generator/python.ml
index fd297321e..f5e400110 100644
--- a/generator/python.ml
+++ b/generator/python.ml
@@ -786,7 +786,6 @@ class GuestFS(object):
         \"\"\"Delete an event callback.\"\"\"
         self._check_not_closed()
         libguestfsmod.delete_event_callback(self._o, event_handle)
-
 ";
 
   let map_join f l @@ -803,6 +802,7 @@ class GuestFS(object):
           args ^
         map_join (fun optarg -> sprintf ", %s=None"
(name_of_optargt optarg))
           optargs in
+      pr "\n";
       pr "    def %s(%s):\n"
         f.name (indent_python decl_string (9 + len_name) 78);
 
@@ -900,12 +900,11 @@ class GuestFS(object):
       );
 
       pr "        return r\n";
-      pr "\n";
 
       (* Aliases. *)
       List.iter (
         fun alias ->
-          pr "    %s = %s\n\n" alias f.name
+          pr "\n    %s = %s\n" alias f.name
       ) f.non_c_aliases
   ) (actions |> external_functions |> sort)
 
diff --git a/python/t/test020Create.py b/python/t/test020Create.py
index 16e19ec76..277fa7051 100644
--- a/python/t/test020Create.py
+++ b/python/t/test020Create.py
@@ -18,6 +18,7 @@
 import unittest
 import guestfs
 
+
 class Test020Create(unittest.TestCase):
     def test_create(self):
         _ = guestfs.GuestFS(python_return_dict=True)
diff --git a/python/t/test030CreateFlags.py b/python/t/test030CreateFlags.py
index b69e488b3..ab522fab4 100644
--- a/python/t/test030CreateFlags.py
+++ b/python/t/test030CreateFlags.py
@@ -18,6 +18,7 @@
 import unittest
 import guestfs
 
+
 class Test030CreateFlags(unittest.TestCase):
     def test_create_flags(self):
         g = guestfs.GuestFS(python_return_dict=True,
diff --git a/python/t/test040CreateMultiple.py
b/python/t/test040CreateMultiple.py
index 190ef256b..d73501edc 100644
--- a/python/t/test040CreateMultiple.py
+++ b/python/t/test040CreateMultiple.py
@@ -18,9 +18,11 @@
 import unittest
 import guestfs
 
+
 def ignore(_):
     pass
 
+
 class Test040CreateMultiple(unittest.TestCase):
     def test_create_multiple(self):
         g1 = guestfs.GuestFS(python_return_dict=True)
diff --git a/python/t/test050HandleProperties.py
b/python/t/test050HandleProperties.py
index 59de8b806..131482c8f 100644
--- a/python/t/test050HandleProperties.py
+++ b/python/t/test050HandleProperties.py
@@ -19,6 +19,7 @@ import unittest
 import warnings
 import guestfs
 
+
 class Test050HandleProperties(unittest.TestCase):
     def test_verbose(self):
         g = guestfs.GuestFS(python_return_dict=True)
diff --git a/python/t/test430ProgressMessages.py
b/python/t/test430ProgressMessages.py
index cbc404cd0..3dab4bd1c 100644
--- a/python/t/test430ProgressMessages.py
+++ b/python/t/test430ProgressMessages.py
@@ -21,10 +21,12 @@ import guestfs
 
 callback_invoked = 0
 
+
 def callback(ev, eh, buf, array):
     global callback_invoked
     callback_invoked += 1
 
+
 class Test430ProgressMessages(unittest.TestCase):
     def test_progress_messages(self):
         global callback_invoked
-- 
2.24.1

Pino Toscano

2020-Jan-10 14:28 UTC

head link

[Libguestfs] [PATCH 2/7] python: PEP 8: adapt whitespaces in lines

Fix continuation indentation, and whitespaces around operators.

This is just code reformatting, with no behaviour changes; no content
changed beside whitespaces, so "git diff -w" gives an empty diff.
---
 python/t/test030CreateFlags.py | 2 +-
 python/t/test820RHBZ912499.py  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/python/t/test030CreateFlags.py b/python/t/test030CreateFlags.py
index ab522fab4..bdfffa44e 100644
--- a/python/t/test030CreateFlags.py
+++ b/python/t/test030CreateFlags.py
@@ -22,5 +22,5 @@ import guestfs
 class Test030CreateFlags(unittest.TestCase):
     def test_create_flags(self):
         g = guestfs.GuestFS(python_return_dict=True,
-                environment=False)
+                            environment=False)
         g.parse_environment()
diff --git a/python/t/test820RHBZ912499.py b/python/t/test820RHBZ912499.py
index f008f0c74..557d750d2 100644
--- a/python/t/test820RHBZ912499.py
+++ b/python/t/test820RHBZ912499.py
@@ -38,7 +38,7 @@ class Test820RHBZ912499(unittest.TestCase):
     def setUp(self):
         # Create a test disk.
         self.filename = os.getcwd() + "/820-rhbz912499.img"
-        guestfs.GuestFS().disk_create(self.filename, "raw",
1024*1024*1024)
+        guestfs.GuestFS().disk_create(self.filename, "raw", 1024 *
1024 * 1024)
 
         # Create a new domain.  This won't work, it will just hang when
         # booted.  But that's sufficient for the test.
-- 
2.24.1

Pino Toscano

2020-Jan-10 14:28 UTC

head link

[Libguestfs] [PATCH 3/7] python: tests: catch specific exception

When trying to import libvirt, catch the specific exception that is
raised when an importing fails.
---
 python/t/tests_helper.py.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/t/tests_helper.py.in b/python/t/tests_helper.py.in
index 93783430e..38f0dc521 100644
--- a/python/t/tests_helper.py.in
+++ b/python/t/tests_helper.py.in
@@ -56,7 +56,7 @@ def skipUnlessLibvirtHasCPointer():
     """
     try:
         import libvirt
-    except:
+    except ImportError:
         return unittest.skip("could not import libvirt")
     # Check we're using the version of libvirt-python that has
     # c_pointer() methods.
-- 
2.24.1

Pino Toscano

2020-Jan-10 14:28 UTC

head link

[Libguestfs] [PATCH 4/7] python: tests: improve variable naming

Use a slightly more descriptive name, as also pointed out by
pycodestyle.

No functional changes.
---
 python/t/test090RetValues.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/python/t/test090RetValues.py b/python/t/test090RetValues.py
index 17b57c954..4a6508462 100644
--- a/python/t/test090RetValues.py
+++ b/python/t/test090RetValues.py
@@ -91,12 +91,12 @@ class Test090PythonRetValues(unittest.TestCase):
         g = guestfs.GuestFS()
 
         self.assertEqual(g.internal_test_rstructlist("0"), [])
-        l = g.internal_test_rstructlist("5")
-        self.assertIsInstance(l, list)
-        self.assertEqual(len(l), 5)
+        retlist = g.internal_test_rstructlist("5")
+        self.assertIsInstance(retlist, list)
+        self.assertEqual(len(retlist), 5)
         for i in range(0, 5):
-            self.assertIsInstance(l[i], dict)
-            self.assertEqual(l[i]["pv_name"], "pv%d" % i)
+            self.assertIsInstance(retlist[i], dict)
+            self.assertEqual(retlist[i]["pv_name"], "pv%d"
% i)
 
         self.assertRaises(RuntimeError, g.internal_test_rstructlisterr)
 
-- 
2.24.1

Pino Toscano

2020-Jan-10 14:28 UTC

head link

[Libguestfs] [PATCH 5/7] python: tests: remove unused imports

No functional changes.
---
 python/t/test070OptArgs.py          | 1 -
 python/t/test080Version.py          | 2 --
 python/t/test100Launch.py           | 1 -
 python/t/test410CloseEvent.py       | 1 -
 python/t/test420LogMessages.py      | 1 -
 python/t/test430ProgressMessages.py | 1 -
 python/t/test800ExplicitClose.py    | 1 -
 python/t/test820RHBZ912499.py       | 1 -
 python/t/test910Libvirt.py          | 1 -
 9 files changed, 10 deletions(-)

diff --git a/python/t/test070OptArgs.py b/python/t/test070OptArgs.py
index 2f07ab0ee..b0dd40b4d 100644
--- a/python/t/test070OptArgs.py
+++ b/python/t/test070OptArgs.py
@@ -16,7 +16,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import unittest
-import os
 import guestfs
 
 
diff --git a/python/t/test080Version.py b/python/t/test080Version.py
index 4fc791ada..f77eea54b 100644
--- a/python/t/test080Version.py
+++ b/python/t/test080Version.py
@@ -16,8 +16,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import unittest
-import sys
-import os
 import guestfs
 from .tests_helper import *
 
diff --git a/python/t/test100Launch.py b/python/t/test100Launch.py
index 0f6aa6b8d..ae0e582ad 100644
--- a/python/t/test100Launch.py
+++ b/python/t/test100Launch.py
@@ -16,7 +16,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import unittest
-import os
 import guestfs
 
 
diff --git a/python/t/test410CloseEvent.py b/python/t/test410CloseEvent.py
index 1a94dd5b3..00cd2e10a 100644
--- a/python/t/test410CloseEvent.py
+++ b/python/t/test410CloseEvent.py
@@ -16,7 +16,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import unittest
-import os
 import guestfs
 
 close_invoked = 0
diff --git a/python/t/test420LogMessages.py b/python/t/test420LogMessages.py
index bec3b9fd4..b25dd43dc 100644
--- a/python/t/test420LogMessages.py
+++ b/python/t/test420LogMessages.py
@@ -16,7 +16,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import unittest
-import os
 import guestfs
 
 log_invoked = 0
diff --git a/python/t/test430ProgressMessages.py
b/python/t/test430ProgressMessages.py
index 3dab4bd1c..b081ba564 100644
--- a/python/t/test430ProgressMessages.py
+++ b/python/t/test430ProgressMessages.py
@@ -16,7 +16,6 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 import unittest
-import os
 import guestfs
 
 callback_invoked = 0
diff --git a/python/t/test800ExplicitClose.py b/python/t/test800ExplicitClose.py
index c380e992c..47a1ebc8d 100644
--- a/python/t/test800ExplicitClose.py
+++ b/python/t/test800ExplicitClose.py
@@ -18,7 +18,6 @@
 # Test implicit vs explicit closes of the handle (RHBZ#717786).
 
 import unittest
-import os
 import guestfs
 
 close_invoked = 0
diff --git a/python/t/test820RHBZ912499.py b/python/t/test820RHBZ912499.py
index 557d750d2..3dec11352 100644
--- a/python/t/test820RHBZ912499.py
+++ b/python/t/test820RHBZ912499.py
@@ -24,7 +24,6 @@ import unittest
 import random
 import string
 import os
-import sys
 import guestfs
 from .tests_helper import *
 
diff --git a/python/t/test910Libvirt.py b/python/t/test910Libvirt.py
index b605b15be..3672a70e7 100644
--- a/python/t/test910Libvirt.py
+++ b/python/t/test910Libvirt.py
@@ -22,7 +22,6 @@
 
 import unittest
 import os
-import sys
 import guestfs
 from .tests_helper import *
 
-- 
2.24.1

Pino Toscano

2020-Jan-10 14:28 UTC

head link

[Libguestfs] [PATCH 6/7] python: improve errors in inspect_vm example

When validating user input, print an error message and exit, instead of
either asserting or raising a non-existing exception.
---
 python/examples/inspect_vm.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/python/examples/inspect_vm.py b/python/examples/inspect_vm.py
index 22cd70f28..dcf3b538c 100644
--- a/python/examples/inspect_vm.py
+++ b/python/examples/inspect_vm.py
@@ -3,7 +3,9 @@
 import sys
 import guestfs
 
-assert(len(sys.argv) == 2)
+if len(sys.argv) < 2:
+    print("inspect_vm: missing disk image to inspect",
file=sys.stderr)
+    sys.exit(1)
 disk = sys.argv[1]
 
 # All new Python code should pass python_return_dict=True
@@ -21,7 +23,8 @@ g.launch()
 # Ask libguestfs to inspect for operating systems.
 roots = g.inspect_os()
 if len(roots) == 0:
-    raise(Error("inspect_vm: no operating systems found"))
+    print("inspect_vm: no operating systems found", file=sys.stderr)
+    sys.exit(1)
 
 for root in roots:
     print("Root device: %s" % root)
-- 
2.24.1

Pino Toscano

2020-Jan-10 14:28 UTC

head link

[Libguestfs] [PATCH 7/7] python: add a pycodestyle test

Look for pycodestyle, and use it to check all the Python sources (tests
and auxiliary scripts included) of the Python bindings.
---
 config.sh.in               |  1 +
 m4/guestfs-python.m4       |  3 +++
 python/Makefile.am         |  5 +++++
 python/test-pycodestyle.sh | 30 ++++++++++++++++++++++++++++++
 4 files changed, 39 insertions(+)
 create mode 100755 python/test-pycodestyle.sh

diff --git a/config.sh.in b/config.sh.in
index c777f096c..02100f703 100644
--- a/config.sh.in
+++ b/config.sh.in
@@ -20,3 +20,4 @@
 # mostly used in other shell scripts.
 
 export XMLLINT="@XMLLINT@"
+export PYCODESTYLE="@PYCODESTYLE@"
diff --git a/m4/guestfs-python.m4 b/m4/guestfs-python.m4
index ac857915f..505eba5df 100644
--- a/m4/guestfs-python.m4
+++ b/m4/guestfs-python.m4
@@ -86,6 +86,9 @@ AS_IF([test "x$enable_python" != "xno"],[
             PYTHON_EXT_SUFFIX=$python_ext_suffix
         fi
         AC_MSG_RESULT([$PYTHON_EXT_SUFFIX])
+
+        AC_CHECK_PROGS([PYCODESTYLE],[pycodestyle],[no])
+        AM_CONDITIONAL([HAVE_PYCODESTYLE], [test "x$PYCODESTYLE" !=
"xno"])
     fi
 
     AC_SUBST(PYTHON_PREFIX)
diff --git a/python/Makefile.am b/python/Makefile.am
index f0a4b55bd..7286ac906 100644
--- a/python/Makefile.am
+++ b/python/Makefile.am
@@ -38,6 +38,7 @@ EXTRA_DIST = \
 	setup.py.in \
 	run-bindtests \
 	run-python-tests \
+	test-pycodestyle.sh \
 	t/__init__.py \
 	t/README \
 	t/test[0-9]*.py
@@ -117,6 +118,10 @@ if ENABLE_APPLIANCE
 TESTS += run-python-tests
 endif ENABLE_APPLIANCE
 
+if HAVE_PYCODESTYLE
+TESTS += test-pycodestyle.sh
+endif
+
 endif HAVE_PYTHON
 
 # Extra clean.
diff --git a/python/test-pycodestyle.sh b/python/test-pycodestyle.sh
new file mode 100755
index 000000000..2a5bf3fac
--- /dev/null
+++ b/python/test-pycodestyle.sh
@@ -0,0 +1,30 @@
+#!/bin/bash -
+# libguestfs
+# Copyright (C) 2020 Red Hat Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+set -e
+
+$TEST_FUNCTIONS
+skip_if_skipped
+
+# Gather the list of Python sources.
+# (-u is passed to to sort to avoid duplicates in case builddir==srcdir)
+files="$(find "$srcdir" . -name '*.py' | sort -u)"
+
+# Ignore:
+# E501 line too long (95 > 79 characters)
+$PYCODESTYLE --ignore=E501 $files
-- 
2.24.1

Richard W.M. Jones

2020-Jan-14 09:56 UTC

head link

Re: [Libguestfs] [PATCH 7/7] python: add a pycodestyle test

Series looks straightforward to me, ACK series.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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