Merge ~smoser/cloud-init:fix/pyflakes-2.0.0-reported-issues into cloud-init:master

[Scott Moser]

pyflakes: fix unused variable references identified by pyflakes 2.0.0.

A newer version of pyflakes (2.0.0) was released.
It identifed some unused variables that version 1.6.0 did not identify.
The change here merely fixes those unused variables.

see commit message

[Joshua Powers (powersj)]

review: Approve

[Ryan Harper (raharper)]

review: Approve

[Server Team CI bot (server-team-bot)]

PASSED: Continuous integration, rev:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/43/
Executed test runs:
    SUCCESS: Checkout
    SUCCESS: Unit & Style Tests
    SUCCESS: Ubuntu LTS: Build
    SUCCESS: Ubuntu LTS: Integration
    SUCCESS: MAAS Compatability Testing
    IN_PROGRESS: Declarative: Post Actions

Click here to trigger a rebuild:
https://jenkins.ubuntu.com/server/job/cloud-init-ci/43/rebuild

review: Approve (continuous-integration)

[Scott Moser (smoser)]

An upstream commit landed for this bug.

To view that commit see the following URL:
https://git.launchpad.net/cloud-init/commit/?id=4ba4639b

diff --git a/cloudinit/config/cc_mounts.py b/cloudinit/config/cc_mounts.py
index eca6ea3..339baba 100644
--- a/cloudinit/config/cc_mounts.py
+++ b/cloudinit/config/cc_mounts.py
@@ -233,7 +233,7 @@ def setup_swapfile(fname, size=None, maxsize=None):
     if str(size).lower() == "auto":
         try:
             memsize = util.read_meminfo()['total']
-        except IOError as e:
+        except IOError:
             LOG.debug("Not creating swap: failed to read meminfo")
             return
 
diff --git a/cloudinit/handlers/upstart_job.py b/cloudinit/handlers/upstart_job.py
index 1ca92d4..dc33876 100644
--- a/cloudinit/handlers/upstart_job.py
+++ b/cloudinit/handlers/upstart_job.py
@@ -97,7 +97,7 @@ def _has_suitable_upstart():
             else:
                 util.logexc(LOG, "dpkg --compare-versions failed [%s]",
                             e.exit_code)
-        except Exception as e:
+        except Exception:
             util.logexc(LOG, "dpkg --compare-versions failed")
         return False
     else:
diff --git a/cloudinit/sources/DataSourceAltCloud.py b/cloudinit/sources/DataSourceAltCloud.py
index f6e86f3..24fd65f 100644
--- a/cloudinit/sources/DataSourceAltCloud.py
+++ b/cloudinit/sources/DataSourceAltCloud.py
@@ -184,11 +184,11 @@ class DataSourceAltCloud(sources.DataSource):
             cmd = CMD_PROBE_FLOPPY
             (cmd_out, _err) = util.subp(cmd)
             LOG.debug('Command: %s\nOutput%s', ' '.join(cmd), cmd_out)
-        except ProcessExecutionError as _err:
-            util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd), _err)
+        except ProcessExecutionError as e:
+            util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd), e)
             return False
-        except OSError as _err:
-            util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd), _err)
+        except OSError as e:
+            util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd), e)
             return False
 
         floppy_dev = '/dev/fd0'
@@ -197,11 +197,11 @@ class DataSourceAltCloud(sources.DataSource):
         try:
             (cmd_out, _err) = util.udevadm_settle(exists=floppy_dev, timeout=5)
             LOG.debug('Command: %s\nOutput%s', ' '.join(cmd), cmd_out)
-        except ProcessExecutionError as _err:
-            util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd), _err)
+        except ProcessExecutionError as e:
+            util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd), e)
             return False
-        except OSError as _err:
-            util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd), _err)
+        except OSError as e:
+            util.logexc(LOG, 'Failed command: %s\n%s', ' '.join(cmd), e)
             return False
 
         try:
diff --git a/cloudinit/sources/DataSourceNoCloud.py b/cloudinit/sources/DataSourceNoCloud.py
index 5d3a8dd..2daea59 100644
--- a/cloudinit/sources/DataSourceNoCloud.py
+++ b/cloudinit/sources/DataSourceNoCloud.py
@@ -78,7 +78,7 @@ class DataSourceNoCloud(sources.DataSource):
                 LOG.debug("Using seeded data from %s", path)
                 mydata = _merge_new_seed(mydata, seeded)
                 break
-            except ValueError as e:
+            except ValueError:
                 pass
 
         # If the datasource config had a 'seedfrom' entry, then that takes
@@ -117,7 +117,7 @@ class DataSourceNoCloud(sources.DataSource):
                     try:
                         seeded = util.mount_cb(dev, _pp2d_callback,
                                                pp2d_kwargs)
-                    except ValueError as e:
+                    except ValueError:
                         if dev in label_list:
                             LOG.warning("device %s with label=%s not a"
                                         "valid seed.", dev, label)
diff --git a/cloudinit/sources/DataSourceOpenNebula.py b/cloudinit/sources/DataSourceOpenNebula.py
index d4a4111..16c1078 100644
--- a/cloudinit/sources/DataSourceOpenNebula.py
+++ b/cloudinit/sources/DataSourceOpenNebula.py
@@ -378,7 +378,7 @@ def read_context_disk_dir(source_dir, asuser=None):
         if asuser is not None:
             try:
                 pwd.getpwnam(asuser)
-            except KeyError as e:
+            except KeyError:
                 raise BrokenContextDiskDir(
                     "configured user '{user}' does not exist".format(
                         user=asuser))
diff --git a/cloudinit/util.py b/cloudinit/util.py
index c0473b8..6ea6ca7 100644
--- a/cloudinit/util.py
+++ b/cloudinit/util.py
@@ -2531,8 +2531,8 @@ def _call_dmidecode(key, dmidecode_path):
         if result.replace(".", "") == "":
             return ""
         return result
-    except (IOError, OSError) as _err:
-        LOG.debug('failed dmidecode cmd: %s\n%s', cmd, _err)
+    except (IOError, OSError) as e:
+        LOG.debug('failed dmidecode cmd: %s\n%s', cmd, e)
         return None