python: Pylint 1.8.2 code conformity

Updated master Python scripts to conform to the newer pylint
1.8.2 standard.

JIRA: VSPERF-563

Change-Id: I19305a008a2e22c2f4841aa83fed85fbdc2d549c
Signed-off-by: Richard Elias <richardx.elias@intel.com>
Reviewed-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Sridhar Rao <sridhar.rao@spirent.com>

3 files changed, 17 insertions, 16 deletions

diff --git a/tools/collectors/collectd/collectd.py b/tools/collectors/collectd/collectd.py
index 90df6b04..700aef47 100644
--- a/tools/collectors/collectd/collectd.py
+++ b/tools/collectors/collectd/collectd.py
@@ -47,7 +47,7 @@ def get_label(sample):
     for label in YLABELS:
         if any(r in sample for r in YLABELS[label]):
             return label
-
+    return None
 
 def plot_graphs(dict_of_arrays):
     """
@@ -259,7 +259,7 @@ class Collectd(collector.ICollector):
         plot_graphs(self.results)
         proc_stats = get_results_to_print(self.results)
         for process in proc_stats:
-            logging.info("Process: " + '_'.join(process.split('_')[:-1]))
+            logging.info("Process: %s", '_'.join(process.split('_')[:-1]))
             for(key, value) in proc_stats[process].items():
                 logging.info("         Statistic: " + str(key) +
                              ", Value: " + str(value))
diff --git a/tools/collectors/collectd/collectd_bucky.py b/tools/collectors/collectd/collectd_bucky.py
index bac24ed7..f6061c55 100644
--- a/tools/collectors/collectd/collectd_bucky.py
+++ b/tools/collectors/collectd/collectd_bucky.py
@@ -498,6 +498,7 @@ class CollectDCrypto(object):
             return self.parse_signed(part_len, data)
         if sec_level == 2:
             return self.parse_encrypted(part_len, data)
+        return None
 
     def parse_signed(self, part_len, data):
         """
@@ -574,12 +575,12 @@ class CollectDConverter(object):
         try:
             name_parts = handler(sample)
             if name_parts is None:
-                return  # treat None as "ignore sample"
+                return None  # treat None as "ignore sample"
             name = '.'.join(name_parts)
         except (AttributeError, IndexError, MemoryError, RuntimeError):
             LOG.exception("Exception in sample handler  %s (%s):",
                           sample["plugin"], handler)
-            return
+            return None
         host = sample.get("host", "")
         return (
             host,
@@ -655,7 +656,7 @@ class CollectDHandler(object):
         Check the value range
         """
         if val is None:
-            return
+            return None
         try:
             vmin, vmax = self.parser.types.type_ranges[stype][vname]
         except KeyError:
@@ -664,11 +665,11 @@ class CollectDHandler(object):
         if vmin is not None and val < vmin:
             LOG.debug("Invalid value %s (<%s) for %s", val, vmin, vname)
             LOG.debug("Last sample: %s", self.last_sample)
-            return
+            return None
         if vmax is not None and val > vmax:
             LOG.debug("Invalid value %s (>%s) for %s", val, vmax, vname)
             LOG.debug("Last sample: %s", self.last_sample)
-            return
+            return None
         return val
 
     def calculate(self, host, name, vtype, val, time):
@@ -684,7 +685,7 @@ class CollectDHandler(object):
         if vtype not in handlers:
             LOG.error("Invalid value type %s for %s", vtype, name)
             LOG.info("Last sample: %s", self.last_sample)
-            return
+            return None
         return handlers[vtype](host, name, val, time)
 
     def _calc_counter(self, host, name, val, time):
@@ -694,13 +695,13 @@ class CollectDHandler(object):
         key = (host, name)
         if key not in self.prev_samples:
             self.prev_samples[key] = (val, time)
-            return
+            return None
         pval, ptime = self.prev_samples[key]
         self.prev_samples[key] = (val, time)
         if time <= ptime:
             LOG.error("Invalid COUNTER update for: %s:%s", key[0], key[1])
             LOG.info("Last sample: %s", self.last_sample)
-            return
+            return None
         if val < pval:
             # this is supposed to handle counter wrap around
             # see https://collectd.org/wiki/index.php/Data_source
@@ -719,13 +720,13 @@ class CollectDHandler(object):
         key = (host, name)
         if key not in self.prev_samples:
             self.prev_samples[key] = (val, time)
-            return
+            return None
         pval, ptime = self.prev_samples[key]
         self.prev_samples[key] = (val, time)
         if time <= ptime:
             LOG.debug("Invalid DERIVE update for: %s:%s", key[0], key[1])
             LOG.debug("Last sample: %s", self.last_sample)
-            return
+            return None
         return float(abs(val - pval)) / (time - ptime)
 
     def _calc_absolute(self, host, name, val, time):
@@ -735,13 +736,13 @@ class CollectDHandler(object):
         key = (host, name)
         if key not in self.prev_samples:
             self.prev_samples[key] = (val, time)
-            return
+            return None
         _, ptime = self.prev_samples[key]
         self.prev_samples[key] = (val, time)
         if time <= ptime:
             LOG.error("Invalid ABSOLUTE update for: %s:%s", key[0], key[1])
             LOG.info("Last sample: %s", self.last_sample)
-            return
+            return None
         return float(val) / (time - ptime)
 
 
diff --git a/tools/collectors/sysmetrics/pidstat.py b/tools/collectors/sysmetrics/pidstat.py
index 99341ccf..245d8d22 100644
--- a/tools/collectors/sysmetrics/pidstat.py
+++ b/tools/collectors/sysmetrics/pidstat.py
@@ -70,7 +70,7 @@ class Pidstat(collector.ICollector):
         into the file in directory with test results
         """
         monitor = settings.getValue('PIDSTAT_MONITOR')
-        self._logger.info('Statistics are requested for: ' + ', '.join(monitor))
+        self._logger.info('Statistics are requested for: %s', ', '.join(monitor))
         pids = systeminfo.get_pids(monitor)
         if pids:
             with open(self._log, 'w') as logfile:
@@ -135,7 +135,7 @@ class Pidstat(collector.ICollector):
         """Logs collected statistics.
         """
         for process in self._results:
-            logging.info("Process: " + '_'.join(process.split('_')[:-1]))
+            logging.info("Process: %s", '_'.join(process.split('_')[:-1]))
             for(key, value) in self._results[process].items():
                 logging.info("         Statistic: " + str(key) +
                              ", Value: " + str(value))