Libguestfs - Jan 2020 - [v2v PATCH 6/6] Revamp check for Python code style

Fixes the majority of the pycodestyle issues in the Python scripts, and
fix the existing test-v2v-python-syntax.sh to use pycodestyle to
actually perform style checks.

Pino Toscano (6):
  PEP 8: adapt whitespaces in lines
  PEP 8: move imports at the top
  PEP 8: adapt empty lines
  tests: find all the Python scripts for syntax checks
  -o rhv-upload: remove unused Python imports
  Revamp check for Python code style

 config.sh.in                                  |   1 +
 m4/guestfs-progs.m4                           |   3 +
 .../ovirtsdk4/__init__.py                     |  39 +++++--
 .../ovirtsdk4/types.py                        |  40 ++++---
 v2v/rhv-upload-createvm.py                    |  20 ++--
 v2v/rhv-upload-deletedisks.py                 |  14 +--
 v2v/rhv-upload-plugin.py                      | 105 ++++++++++++------
 v2v/rhv-upload-precheck.py                    |  18 ++-
 v2v/rhv-upload-vmcheck.py                     |  16 ++-
 v2v/test-v2v-python-syntax.sh                 |  17 ++-
 10 files changed, 165 insertions(+), 108 deletions(-)

-- 
2.24.1

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
---
 .../ovirtsdk4/__init__.py                     | 16 ++---
 .../ovirtsdk4/types.py                        | 28 ++++----
 v2v/rhv-upload-createvm.py                    | 18 ++---
 v2v/rhv-upload-deletedisks.py                 | 12 ++--
 v2v/rhv-upload-plugin.py                      | 72 +++++++++----------
 v2v/rhv-upload-precheck.py                    | 16 ++---
 v2v/rhv-upload-vmcheck.py                     | 14 ++--
 7 files changed, 88 insertions(+), 88 deletions(-)

diff --git a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
index 09d861d3..774c7a5c 100644
--- a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
+++ b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
@@ -26,12 +26,12 @@ class NotFoundError(Error):
 class Connection(object):
     def __init__(
             self,
-            url = None,
-            username = None,
-            password = None,
-            ca_file = None,
-            log = None,
-            insecure = False,
+            url=None,
+            username=None,
+            password=None,
+            ca_file=None,
+            log=None,
+            insecure=False,
             debug=True,
     ):
         pass
@@ -119,7 +119,7 @@ class ImageTransfersService(object):
 
 class StorageDomainsService(object):
     def list(self, search=None, case_sensitive=False):
-        return [ StorageDomain() ]
+        return [StorageDomain()]
 
 class VmsService(object):
     def add(self, vm):
@@ -179,5 +179,5 @@ imageio_port = httpd.server_address[1]
 def server():
     httpd.serve_forever()
 
-thread = threading.Thread(target = server, args = [], daemon = True)
+thread = threading.Thread(target=server, args=[], daemon=True)
 thread.start()
diff --git a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/types.py
b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/types.py
index 0b165c24..3b5cd0ac 100644
--- a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/types.py
+++ b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/types.py
@@ -63,14 +63,14 @@ class DiskStatus(Enum):
 class Disk(object):
     def __init__(
             self,
-            id = None,
-            name = None,
-            description = None,
-            format = None,
-            initial_size = None,
-            provisioned_size = None,
-            sparse = False,
-            storage_domains = None
+            id=None,
+            name=None,
+            description=None,
+            format=None,
+            initial_size=None,
+            provisioned_size=None,
+            sparse=False,
+            storage_domains=None
     ):
         self.id = id
 
@@ -98,9 +98,9 @@ class ImageTransferPhase(Enum):
 class ImageTransfer(object):
     def __init__(
             self,
-            disk = None,
-            host = None,
-            inactivity_timeout = None,
+            disk=None,
+            host=None,
+            inactivity_timeout=None,
     ):
         pass
 
@@ -113,7 +113,7 @@ class Initialization(object):
         pass
 
 class StorageDomain(object):
-    def __init__(self, name = None):
+    def __init__(self, name=None):
         pass
 
     id = "ba87af68-b630-4211-a73a-694c1a689405"
@@ -122,8 +122,8 @@ class StorageDomain(object):
 class Vm(object):
     def __init__(
             self,
-            cluster = None,
-            initialization = None
+            cluster=None,
+            initialization=None
     ):
         pass
 
diff --git a/v2v/rhv-upload-createvm.py b/v2v/rhv-upload-createvm.py
index ed57a9b2..f0b747ec 100644
--- a/v2v/rhv-upload-createvm.py
+++ b/v2v/rhv-upload-createvm.py
@@ -55,12 +55,12 @@ username = parsed.username or "admin@internal"
 
 # Connect to the server.
 connection = sdk.Connection(
-    url = params['output_conn'],
-    username = username,
-    password = output_password,
-    ca_file = params['rhv_cafile'],
-    log = logging.getLogger(),
-    insecure = params['insecure'],
+    url=params['output_conn'],
+    username=username,
+    password=output_password,
+    ca_file=params['rhv_cafile'],
+    log=logging.getLogger(),
+    insecure=params['insecure'],
 )
 
 system_service = connection.system_service()
@@ -74,9 +74,9 @@ vm = vms_service.add(
     types.Vm(
         cluster=cluster,
         initialization=types.Initialization(
-            configuration = types.Configuration(
-                type = types.ConfigurationType.OVA,
-                data = ovf,
+            configuration=types.Configuration(
+                type=types.ConfigurationType.OVA,
+                data=ovf,
             )
         )
     )
diff --git a/v2v/rhv-upload-deletedisks.py b/v2v/rhv-upload-deletedisks.py
index bdd570b4..3c970801 100644
--- a/v2v/rhv-upload-deletedisks.py
+++ b/v2v/rhv-upload-deletedisks.py
@@ -50,12 +50,12 @@ username = parsed.username or "admin@internal"
 
 # Connect to the server.
 connection = sdk.Connection(
-    url = params['output_conn'],
-    username = username,
-    password = output_password,
-    ca_file = params['rhv_cafile'],
-    log = logging.getLogger(),
-    insecure = params['insecure'],
+    url=params['output_conn'],
+    username=username,
+    password=output_password,
+    ca_file=params['rhv_cafile'],
+    log=logging.getLogger(),
+    insecure=params['insecure'],
 )
 
 system_service = connection.system_service()
diff --git a/v2v/rhv-upload-plugin.py b/v2v/rhv-upload-plugin.py
index 3942ec72..ab14bc2d 100644
--- a/v2v/rhv-upload-plugin.py
+++ b/v2v/rhv-upload-plugin.py
@@ -34,7 +34,7 @@ import ovirtsdk4.types as types
 
 # Timeout to wait for oVirt disks to change status, or the transfer
 # object to finish initializing [seconds].
-timeout = 5*60
+timeout = 5 * 60
 
 # Parameters are passed in via a JSON doc from the OCaml code.
 # Because this Python code ships embedded inside virt-v2v there
@@ -93,12 +93,12 @@ def failing(func):
 
 def open(readonly):
     connection = sdk.Connection(
-        url = params['output_conn'],
-        username = parse_username(),
-        password = read_password(),
-        ca_file = params['rhv_cafile'],
-        log = logging.getLogger(),
-        insecure = params['insecure'],
+        url=params['output_conn'],
+        username=parse_username(),
+        password=read_password(),
+        ca_file=params['rhv_cafile'],
+        log=logging.getLogger(),
+        insecure=params['insecure'],
     )
 
     # Use the local host is possible.
@@ -175,7 +175,7 @@ def pread(h, count, offset):
     http = h['http']
     transfer = h['transfer']
 
-    headers = {"Range": "bytes=%d-%d" % (offset,
offset+count-1)}
+    headers = {"Range": "bytes=%d-%d" % (offset, offset +
count - 1)}
     if h['needs_auth']:
         headers["Authorization"] = transfer.signed_ticket
 
@@ -196,14 +196,14 @@ def pwrite(h, buf, offset):
     transfer = h['transfer']
 
     count = len(buf)
-    h['highestwrite'] = max(h['highestwrite'], offset+count)
+    h['highestwrite'] = max(h['highestwrite'], offset + count)
 
     http.putrequest("PUT", h['path'] + "?flush=n")
     if h['needs_auth']:
         http.putheader("Authorization", transfer.signed_ticket)
     # The oVirt server only uses the first part of the range, and the
     # content-length.
-    http.putheader("Content-Range", "bytes %d-%d/*" %
(offset, offset+count-1))
+    http.putheader("Content-Range", "bytes %d-%d/*" %
(offset, offset + count - 1))
     http.putheader("Content-Length", str(count))
     http.endheaders()
 
@@ -258,17 +258,17 @@ def emulate_zero(h, count, offset):
     # Since we've just created a new disk it's safe to ignore these
     # requests as long as they are smaller than the highest write seen.
     # After that we must emulate them with writes.
-    if offset+count < h['highestwrite']:
+    if offset + count < h['highestwrite']:
         http.putrequest("PUT", h['path'])
         if h['needs_auth']:
             http.putheader("Authorization", transfer.signed_ticket)
         http.putheader("Content-Range",
-                       "bytes %d-%d/*" % (offset, offset+count-1))
+                       "bytes %d-%d/*" % (offset, offset + count -
1))
         http.putheader("Content-Length", str(count))
         http.endheaders()
 
         try:
-            buf = bytearray(128*1024)
+            buf = bytearray(128 * 1024)
             while count > len(buf):
                 http.send(buf)
                 count -= len(buf)
@@ -426,7 +426,7 @@ def find_host(connection):
     host = hosts[0]
     debug("host.id = %r" % host.id)
 
-    return types.Host(id = host.id)
+    return types.Host(id=host.id)
 
 def create_disk(connection):
     """
@@ -443,23 +443,23 @@ def create_disk(connection):
         disk_format = types.DiskFormat.COW
 
     disk = disks_service.add(
-        disk = types.Disk(
+        disk=types.Disk(
             # The ID is optional.
-            id = params.get('rhv_disk_uuid'),
-            name = params['disk_name'],
-            description = "Uploaded by virt-v2v",
-            format = disk_format,
+            id=params.get('rhv_disk_uuid'),
+            name=params['disk_name'],
+            description="Uploaded by virt-v2v",
+            format=disk_format,
             # XXX For qcow2 disk on block storage, we should use the estimated
             # size, based on qemu-img measure of the overlay.
-            initial_size = params['disk_size'],
-            provisioned_size = params['disk_size'],
+            initial_size=params['disk_size'],
+            provisioned_size=params['disk_size'],
             # XXX Ignores params['output_sparse'].
             # Handling this properly will be complex, see:
             #
https://www.redhat.com/archives/libguestfs/2018-March/msg00177.html
-            sparse = True,
-            storage_domains = [
+            sparse=True,
+            storage_domains=[
                 types.StorageDomain(
-                    name = params['output_storage'],
+                    name=params['output_storage'],
                 )
             ],
         )
@@ -498,9 +498,9 @@ def create_transfer(connection, disk, host):
 
     transfer = transfers_service.add(
         types.ImageTransfer(
-            disk = types.Disk(id = disk.id),
-            host = host,
-            inactivity_timeout = 3600,
+            disk=types.Disk(id=disk.id),
+            host=host,
+            inactivity_timeout=3600,
             **extra,
         )
     )
@@ -559,8 +559,8 @@ def cancel_transfer(connection, transfer):
     """
     debug("canceling transfer %s" % transfer.id)
     transfer_service = (connection.system_service()
-                            .image_transfers_service()
-                            .image_transfer_service(transfer.id))
+                        .image_transfers_service()
+                        .image_transfer_service(transfer.id))
     transfer_service.cancel()
 
 def finalize_transfer(connection, transfer, disk_id):
@@ -585,16 +585,16 @@ def finalize_transfer(connection, transfer, disk_id):
     """
     debug("finalizing transfer %s" % transfer.id)
     transfer_service = (connection.system_service()
-                            .image_transfers_service()
-                            .image_transfer_service(transfer.id))
+                        .image_transfers_service()
+                        .image_transfer_service(transfer.id))
 
     start = time.time()
 
     transfer_service.finalize()
 
     disk_service = (connection.system_service()
-                        .disks_service()
-                        .disk_service(disk_id))
+                    .disks_service()
+                    .disk_service(disk_id))
 
     while True:
         time.sleep(1)
@@ -656,13 +656,13 @@ def create_http(url):
     """
     if url.scheme == "https":
         context = \
-            ssl.create_default_context(purpose = ssl.Purpose.SERVER_AUTH,
-                                       cafile = params['rhv_cafile'])
+            ssl.create_default_context(purpose=ssl.Purpose.SERVER_AUTH,
+                                       cafile=params['rhv_cafile'])
         if params['insecure']:
             context.check_hostname = False
             context.verify_mode = ssl.CERT_NONE
 
-        return HTTPSConnection(url.hostname, url.port, context = context)
+        return HTTPSConnection(url.hostname, url.port, context=context)
     elif url.scheme == "http":
         return HTTPConnection(url.hostname, url.port)
     else:
diff --git a/v2v/rhv-upload-precheck.py b/v2v/rhv-upload-precheck.py
index 1b344ba2..e8be90c5 100644
--- a/v2v/rhv-upload-precheck.py
+++ b/v2v/rhv-upload-precheck.py
@@ -50,12 +50,12 @@ username = parsed.username or "admin@internal"
 
 # Connect to the server.
 connection = sdk.Connection(
-    url = params['output_conn'],
-    username = username,
-    password = output_password,
-    ca_file = params['rhv_cafile'],
-    log = logging.getLogger(),
-    insecure = params['insecure'],
+    url=params['output_conn'],
+    username=username,
+    password=output_password,
+    ca_file=params['rhv_cafile'],
+    log=logging.getLogger(),
+    insecure=params['insecure'],
 )
 
 system_service = connection.system_service()
@@ -97,8 +97,8 @@ cluster = clusters[0]
 
 # Otherwise everything is OK, print a JSON with the results.
 results = {
-  "rhv_storagedomain_uuid": storage_domain.id,
-  "rhv_cluster_uuid": cluster.id,
+    "rhv_storagedomain_uuid": storage_domain.id,
+    "rhv_cluster_uuid": cluster.id,
 }
 
 json.dump(results, sys.stdout)
diff --git a/v2v/rhv-upload-vmcheck.py b/v2v/rhv-upload-vmcheck.py
index fbb884b9..89ead726 100644
--- a/v2v/rhv-upload-vmcheck.py
+++ b/v2v/rhv-upload-vmcheck.py
@@ -50,12 +50,12 @@ username = parsed.username or "admin@internal"
 
 # Connect to the server.
 connection = sdk.Connection(
-    url = params['output_conn'],
-    username = username,
-    password = output_password,
-    ca_file = params['rhv_cafile'],
-    log = logging.getLogger(),
-    insecure = params['insecure'],
+    url=params['output_conn'],
+    username=username,
+    password=output_password,
+    ca_file=params['rhv_cafile'],
+    log=logging.getLogger(),
+    insecure=params['insecure'],
 )
 
 system_service = connection.system_service()
@@ -63,7 +63,7 @@ system_service = connection.system_service()
 # Find if a virtual machine already exists with that name.
 vms_service = system_service.vms_service()
 vms = vms_service.list(
-    search = ("name=%s" % params['output_name']),
+    search=("name=%s" % params['output_name']),
 )
 if len(vms) > 0:
     vm = vms[0]
-- 
2.24.1

No functional changes.
---
 tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
index 774c7a5c..0bc2890f 100644
--- a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
+++ b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
@@ -18,6 +18,10 @@
 # Fake ovirtsdk4 module used as a test harness.
 # See v2v/test-v2v-o-rhv-upload.sh
 
+from http.server import HTTPServer, BaseHTTPRequestHandler
+import threading
+
+
 class Error(Exception):
     pass
 class NotFoundError(Error):
@@ -131,9 +135,6 @@ class VmsService(object):
 # Create a background thread running a web server which is
 # simulating the imageio server.
 
-from http.server import HTTPServer, BaseHTTPRequestHandler
-import threading
-
 class RequestHandler(BaseHTTPRequestHandler):
     protocol_version = 'HTTP/1.1'
 
-- 
2.24.1

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

This is just formatting, no behaviour changes.
---
 .../ovirtsdk4/__init__.py                     | 18 ++++++++++
 .../ovirtsdk4/types.py                        | 12 +++++++
 v2v/rhv-upload-plugin.py                      | 33 +++++++++++++++++++
 3 files changed, 63 insertions(+)

diff --git a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
index 0bc2890f..abb7050c 100644
--- a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
+++ b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/__init__.py
@@ -24,9 +24,12 @@ import threading
 
 class Error(Exception):
     pass
+
+
 class NotFoundError(Error):
     pass
 
+
 class Connection(object):
     def __init__(
             self,
@@ -49,6 +52,7 @@ class Connection(object):
     def system_service(self):
         return SystemService()
 
+
 class SystemService(object):
     def clusters_service(self):
         return ClustersService()
@@ -68,18 +72,22 @@ class SystemService(object):
     def vms_service(self):
         return VmsService()
 
+
 class ClusterService(object):
     def get(self):
         return types.Cluster()
 
+
 class ClustersService(object):
     def cluster_service(self, id):
         return ClusterService()
 
+
 class DataCentersService(object):
     def list(self, search=None, case_sensitive=False):
         return [types.DataCenter()]
 
+
 class DiskService(object):
     def __init__(self, disk_id):
         self._disk_id = disk_id
@@ -90,6 +98,7 @@ class DiskService(object):
     def remove(self):
         pass
 
+
 class DisksService(object):
     def add(self, disk=None):
         disk.id = "756d81b0-d5c0-41bc-9bbe-b343c3fa3490"
@@ -98,6 +107,7 @@ class DisksService(object):
     def disk_service(self, disk_id):
         return DiskService(disk_id)
 
+
 class ImageTransferService(object):
     def __init__(self):
         self._finalized = False
@@ -114,6 +124,7 @@ class ImageTransferService(object):
     def finalize(self):
         self._finalized = True
 
+
 class ImageTransfersService(object):
     def add(self, transfer):
         return transfer
@@ -121,10 +132,12 @@ class ImageTransfersService(object):
     def image_transfer_service(self, id):
         return ImageTransferService()
 
+
 class StorageDomainsService(object):
     def list(self, search=None, case_sensitive=False):
         return [StorageDomain()]
 
+
 class VmsService(object):
     def add(self, vm):
         return vm
@@ -132,9 +145,11 @@ class VmsService(object):
     def list(self, search=None):
         return []
 
+
 # Create a background thread running a web server which is
 # simulating the imageio server.
 
+
 class RequestHandler(BaseHTTPRequestHandler):
     protocol_version = 'HTTP/1.1'
 
@@ -171,14 +186,17 @@ class RequestHandler(BaseHTTPRequestHandler):
             length = int(length)
             content = self.rfile.read(length)
 
+
 server_address = ("", 0)
 # XXX This should test HTTPS, not HTTP, because we are testing a
 # different path through the main code.
 httpd = HTTPServer(server_address, RequestHandler)
 imageio_port = httpd.server_address[1]
 
+
 def server():
     httpd.serve_forever()
 
+
 thread = threading.Thread(target=server, args=[], daemon=True)
 thread.start()
diff --git a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/types.py
b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/types.py
index 3b5cd0ac..b8d4a728 100644
--- a/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/types.py
+++ b/tests/test-v2v-o-rhv-upload-module/ovirtsdk4/types.py
@@ -21,14 +21,17 @@
 from enum import Enum
 from ovirtsdk4 import imageio_port
 
+
 class Cluster(object):
     id = "2e97537b-a783-4706-af9e-75cb2e032dcd"
     name = "Default"
 
+
 class Configuration(object):
     def __init__(self, type=None, data=None):
         pass
 
+
 class ConfigurationType(Enum):
     OVA = 'ova'
     OVF = 'ovf'
@@ -39,6 +42,7 @@ class ConfigurationType(Enum):
     def __str__(self):
         return self._image
 
+
 class DiskFormat(Enum):
     COW = "cow"
     RAW = "raw"
@@ -49,6 +53,7 @@ class DiskFormat(Enum):
     def __str__(self):
         return self._image
 
+
 class DiskStatus(Enum):
     ILLEGAL = "illegal"
     LOCKED = "locked"
@@ -60,6 +65,7 @@ class DiskStatus(Enum):
     def __str__(self):
         return self._image
 
+
 class Disk(object):
     def __init__(
             self,
@@ -76,6 +82,7 @@ class Disk(object):
 
     status = DiskStatus.OK
 
+
 class ImageTransferPhase(Enum):
     CANCELLED = 'cancelled'
     FINALIZING_FAILURE = 'finalizing_failure'
@@ -95,6 +102,7 @@ class ImageTransferPhase(Enum):
     def __str__(self):
         return self._image
 
+
 class ImageTransfer(object):
     def __init__(
             self,
@@ -108,10 +116,12 @@ class ImageTransfer(object):
     phase = ImageTransferPhase.TRANSFERRING
     transfer_url = "http://localhost:" + str(imageio_port) +
"/"
 
+
 class Initialization(object):
     def __init__(self, configuration):
         pass
 
+
 class StorageDomain(object):
     def __init__(self, name=None):
         pass
@@ -119,6 +129,7 @@ class StorageDomain(object):
     id = "ba87af68-b630-4211-a73a-694c1a689405"
     name = "Storage"
 
+
 class Vm(object):
     def __init__(
             self,
@@ -127,6 +138,7 @@ class Vm(object):
     ):
         pass
 
+
 class DataCenter(object):
     id = "31d8c73b-554b-4958-bb04-9ce97f0849e1"
     name = "DC"
diff --git a/v2v/rhv-upload-plugin.py b/v2v/rhv-upload-plugin.py
index ab14bc2d..d3e6260e 100644
--- a/v2v/rhv-upload-plugin.py
+++ b/v2v/rhv-upload-plugin.py
@@ -41,6 +41,7 @@ timeout = 5 * 60
 # is no formal API here.
 params = None
 
+
 def config(key, value):
     global params
 
@@ -51,15 +52,18 @@ def config(key, value):
     else:
         raise RuntimeError("unknown configuration key '%s'" %
key)
 
+
 def config_complete():
     if params is None:
         raise RuntimeError("missing configuration parameters")
 
+
 def debug(s):
     if params['verbose']:
         print(s, file=sys.stderr)
         sys.stderr.flush()
 
+
 def read_password():
     """
     Read the password from file.
@@ -68,6 +72,7 @@ def read_password():
         data = fp.read()
     return data.rstrip()
 
+
 def parse_username():
     """
     Parse out the username from the output_conn URL.
@@ -75,6 +80,7 @@ def parse_username():
     parsed = urlparse(params['output_conn'])
     return parsed.username or "admin@internal"
 
+
 def failing(func):
     """
     Decorator marking the handle as failed if any expection is raised in the
@@ -91,6 +97,7 @@ def failing(func):
 
     return wrapper
 
+
 def open(readonly):
     connection = sdk.Connection(
         url=params['output_conn'],
@@ -134,18 +141,22 @@ def open(readonly):
         'path': destination_url.path,
     }
 
+
 @failing
 def can_trim(h):
     return h['can_trim']
 
+
 @failing
 def can_flush(h):
     return h['can_flush']
 
+
 @failing
 def get_size(h):
     return params['disk_size']
 
+
 # Any unexpected HTTP response status from the server will end up calling this
 # function which logs the full error, and raises a RuntimeError exception.
 def request_failed(r, msg):
@@ -165,11 +176,13 @@ def request_failed(r, msg):
     # Only a short error is included in the exception.
     raise RuntimeError("%s: %d %s: %r" % (msg, status, reason,
body[:200]))
 
+
 # For documentation see:
 # https://github.com/oVirt/ovirt-imageio/blob/master/docs/random-io.md
 # For examples of working code to read/write from the server, see:
 # https://github.com/oVirt/ovirt-imageio/blob/master/daemon/test/server_test.py
 
+
 @failing
 def pread(h, count, offset):
     http = h['http']
@@ -190,6 +203,7 @@ def pread(h, count, offset):
 
     return r.read()
 
+
 @failing
 def pwrite(h, buf, offset):
     http = h['http']
@@ -220,6 +234,7 @@ def pwrite(h, buf, offset):
 
     r.read()
 
+
 @failing
 def zero(h, count, offset, may_trim):
     http = h['http']
@@ -250,6 +265,7 @@ def zero(h, count, offset, may_trim):
 
     r.read()
 
+
 def emulate_zero(h, count, offset):
     http = h['http']
     transfer = h['transfer']
@@ -284,6 +300,7 @@ def emulate_zero(h, count, offset):
 
         r.read()
 
+
 @failing
 def trim(h, count, offset):
     http = h['http']
@@ -307,6 +324,7 @@ def trim(h, count, offset):
 
     r.read()
 
+
 @failing
 def flush(h):
     http = h['http']
@@ -325,6 +343,7 @@ def flush(h):
 
     r.read()
 
+
 def close(h):
     http = h['http']
     connection = h['connection']
@@ -362,11 +381,13 @@ def close(h):
     finally:
         connection.close()
 
+
 # Modify http.client.HTTPConnection to work over a Unix domain socket.
 # Derived from uhttplib written by Erik van Zijst under an MIT license.
 # (https://pypi.org/project/uhttplib/)
 # Ported to Python 3 by Irit Goihman.
 
+
 class UnixHTTPConnection(HTTPConnection):
     def __init__(self, path, timeout=socket._GLOBAL_DEFAULT_TIMEOUT):
         self.path = path
@@ -378,8 +399,10 @@ class UnixHTTPConnection(HTTPConnection):
             self.sock.settimeout(timeout)
         self.sock.connect(self.path)
 
+
 # oVirt SDK operations
 
+
 def find_host(connection):
     """Return the current host object or None."""
     try:
@@ -428,6 +451,7 @@ def find_host(connection):
 
     return types.Host(id=host.id)
 
+
 def create_disk(connection):
     """
     Create a new disk for the transfer and wait until the disk is ready.
@@ -483,6 +507,7 @@ def create_disk(connection):
 
     return disk
 
+
 def create_transfer(connection, disk, host):
     """
     Create image transfer and wait until the transfer is ready.
@@ -553,6 +578,7 @@ def create_transfer(connection, disk, host):
 
     return transfer
 
+
 def cancel_transfer(connection, transfer):
     """
     Cancel a transfer, removing the transfer disk.
@@ -563,6 +589,7 @@ def cancel_transfer(connection, transfer):
                         .image_transfer_service(transfer.id))
     transfer_service.cancel()
 
+
 def finalize_transfer(connection, transfer, disk_id):
     """
     Finalize a transfer, making the transfer disk available.
@@ -621,6 +648,7 @@ def finalize_transfer(connection, transfer, disk_id):
                 "timed out waiting for transfer %s to finalize"
                 % transfer.id)
 
+
 def transfer_supports_format():
     """
     Return True if transfer supports the "format" argument, enabing
the NBD
@@ -632,8 +660,10 @@ def transfer_supports_format():
     sig = inspect.signature(types.ImageTransfer)
     return "format" in sig.parameters
 
+
 # oVirt imageio operations
 
+
 def parse_transfer_url(transfer):
     """
     Returns a parsed transfer url, preferring direct transfer if possible.
@@ -648,6 +678,7 @@ def parse_transfer_url(transfer):
     else:
         return urlparse(transfer.proxy_url)
 
+
 def create_http(url):
     """
     Create http connection for transfer url.
@@ -668,6 +699,7 @@ def create_http(url):
     else:
         raise RuntimeError("unknown URL scheme (%s)" % url.scheme)
 
+
 def get_options(http, url):
     """
     Send OPTIONS request to imageio server and return options dict.
@@ -704,6 +736,7 @@ def get_options(http, url):
         raise RuntimeError("could not use OPTIONS request: %d: %s" %
                            (r.status, r.reason))
 
+
 def optimize_http(http, host, options):
     """
     Return an optimized http connection using unix socket if we are connected
-- 
2.24.1

Find all the Python scripts in v2v, instead of hardcoding a list.
---
 v2v/test-v2v-python-syntax.sh | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/v2v/test-v2v-python-syntax.sh b/v2v/test-v2v-python-syntax.sh
index 035d92a2..e2936826 100755
--- a/v2v/test-v2v-python-syntax.sh
+++ b/v2v/test-v2v-python-syntax.sh
@@ -22,14 +22,14 @@ $TEST_FUNCTIONS
 skip_if_skipped
 
 # Files to check.
-files="rhv-upload-createvm.py rhv-upload-plugin.py
rhv-upload-precheck.py"
+files="$(find "$srcdir" -name '*.py')"
 
 # Base version of Python.
 python=python3
 
 # Checks the files are syntactically correct, but not very much else.
 for f in $files; do
-    $python -m py_compile "$srcdir/$f"
+    $python -m py_compile "$f"
 done
 
 # Checks the files correspond to PEP8 coding style.
@@ -40,6 +40,6 @@ if $python-pep8 --version >/dev/null 2>&1; then
         # E226 missing whitespace around arithmetic operator
         # E251 unexpected spaces around keyword / parameter equals
         # E302 expected 2 blank lines, found 1
-        $python-pep8 --ignore=E226,E251,E302 "$srcdir/$f"
+        $python-pep8 --ignore=E226,E251,E302 "$f"
     done
 fi
-- 
2.24.1

No functional changes.
---
 v2v/rhv-upload-createvm.py    | 2 --
 v2v/rhv-upload-deletedisks.py | 2 --
 v2v/rhv-upload-precheck.py    | 2 --
 v2v/rhv-upload-vmcheck.py     | 2 --
 4 files changed, 8 deletions(-)

diff --git a/v2v/rhv-upload-createvm.py b/v2v/rhv-upload-createvm.py
index f0b747ec..50bb7e34 100644
--- a/v2v/rhv-upload-createvm.py
+++ b/v2v/rhv-upload-createvm.py
@@ -19,9 +19,7 @@
 import json
 import logging
 import sys
-import time
 
-from http.client import HTTPSConnection
 from urllib.parse import urlparse
 
 import ovirtsdk4 as sdk
diff --git a/v2v/rhv-upload-deletedisks.py b/v2v/rhv-upload-deletedisks.py
index 3c970801..8ed8cb88 100644
--- a/v2v/rhv-upload-deletedisks.py
+++ b/v2v/rhv-upload-deletedisks.py
@@ -19,9 +19,7 @@
 import json
 import logging
 import sys
-import time
 
-from http.client import HTTPSConnection
 from urllib.parse import urlparse
 
 import ovirtsdk4 as sdk
diff --git a/v2v/rhv-upload-precheck.py b/v2v/rhv-upload-precheck.py
index e8be90c5..5f33db98 100644
--- a/v2v/rhv-upload-precheck.py
+++ b/v2v/rhv-upload-precheck.py
@@ -19,9 +19,7 @@
 import json
 import logging
 import sys
-import time
 
-from http.client import HTTPSConnection
 from urllib.parse import urlparse
 
 import ovirtsdk4 as sdk
diff --git a/v2v/rhv-upload-vmcheck.py b/v2v/rhv-upload-vmcheck.py
index 89ead726..2255d714 100644
--- a/v2v/rhv-upload-vmcheck.py
+++ b/v2v/rhv-upload-vmcheck.py
@@ -19,9 +19,7 @@
 import json
 import logging
 import sys
-import time
 
-from http.client import HTTPSConnection
 from urllib.parse import urlparse
 
 import ovirtsdk4 as sdk
-- 
2.24.1

It turns out that
a) the standalone pep8 executable is deprecated in favour of pycodestyle
b) $python-pep8 does not exist in modern distros
and thus the style checks for Python scripts have been skipped for a
long time.

Instead, switch to pycodestyle directly, updating the list of ignored
issues to the two categories left.
---
 config.sh.in                  |  1 +
 m4/guestfs-progs.m4           |  3 +++
 v2v/test-v2v-python-syntax.sh | 13 +++++--------
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/config.sh.in b/config.sh.in
index f3245379..be304b39 100644
--- a/config.sh.in
+++ b/config.sh.in
@@ -20,3 +20,4 @@
 # mostly used in other shell scripts.
 
 export
VIRT_V2V_NBDKIT_PYTHON_PLUGIN="@VIRT_V2V_NBDKIT_PYTHON_PLUGIN@"
+export PYCODESTYLE="@PYCODESTYLE@"
diff --git a/m4/guestfs-progs.m4 b/m4/guestfs-progs.m4
index 5f481a75..56baa857 100644
--- a/m4/guestfs-progs.m4
+++ b/m4/guestfs-progs.m4
@@ -73,3 +73,6 @@ AS_IF([test "x$VALGRIND" != "xno"],[
 ])
 AC_SUBST([VG])
 AM_SUBST_NOTMAKE([VG])
+
+dnl pycodestyle, used to check the Python scripts.
+AC_CHECK_PROGS([PYCODESTYLE],[pycodestyle],[no])
diff --git a/v2v/test-v2v-python-syntax.sh b/v2v/test-v2v-python-syntax.sh
index e2936826..4fd2184a 100755
--- a/v2v/test-v2v-python-syntax.sh
+++ b/v2v/test-v2v-python-syntax.sh
@@ -34,12 +34,9 @@ done
 
 # Checks the files correspond to PEP8 coding style.
 # https://www.python.org/dev/peps/pep-0008/
-if $python-pep8 --version >/dev/null 2>&1; then
-    for f in $files; do
-        # Ignore:
-        # E226 missing whitespace around arithmetic operator
-        # E251 unexpected spaces around keyword / parameter equals
-        # E302 expected 2 blank lines, found 1
-        $python-pep8 --ignore=E226,E251,E302 "$f"
-    done
+if test "x$PYCODESTYLE" != xno; then
+    # Ignore:
+    # E501 line too long
+    # E722 do not use bare 'except'
+    $PYCODESTYLE --ignore=E501,E722 $files
 fi
-- 
2.24.1

Looks all fine, ACK series.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v