Reformat python files checked by pylint (part 1/2).

After recently changing .pylintrc (see [1]) we discovered that
the presubmit check always checks all the python files when just
one python file gets updated.

This CL moves all these files one step closer to what the linter
wants.

Autogenerated with:

# Added all the files under pylint control to ~/Desktop/to-reformat
cat ~/Desktop/to-reformat | xargs sed -i '1i\\'
git cl format --python --full

This is part 1 out of 2. The second part will fix function names and
will not be automated.

[1] - https://webrtc-review.googlesource.com/c/src/+/186664

No-Presubmit: True
Bug: webrtc:12114
Change-Id: Idfec4d759f209a2090440d0af2413a1ddc01b841
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/190980
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32530}

tools_webrtc/cpu/cpu_mon.py

@@ -8,7 +8,6 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-
 import psutil
 import sys
 
@@ -17,67 +16,68 @@ from matplotlib import pyplot
 
 
 class CpuSnapshot(object):
-  def __init__(self, label):
-    self.label = label
-    self.samples = []
+    def __init__(self, label):
+        self.label = label
+        self.samples = []
 
-  def Capture(self, sample_count):
-    print ('Capturing %d CPU samples for %s...' %
-           ((sample_count - len(self.samples)), self.label))
-    while len(self.samples) < sample_count:
-      self.samples.append(psutil.cpu_percent(1.0, False))
+    def Capture(self, sample_count):
+        print('Capturing %d CPU samples for %s...' %
+              ((sample_count - len(self.samples)), self.label))
+        while len(self.samples) < sample_count:
+            self.samples.append(psutil.cpu_percent(1.0, False))
 
-  def Text(self):
-    return ('%s: avg=%s, median=%s, min=%s, max=%s' %
-            (self.label, numpy.average(self.samples),
-             numpy.median(self.samples),
-             numpy.min(self.samples), numpy.max(self.samples)))
+    def Text(self):
+        return ('%s: avg=%s, median=%s, min=%s, max=%s' %
+                (self.label, numpy.average(self.samples),
+                 numpy.median(self.samples), numpy.min(
+                     self.samples), numpy.max(self.samples)))
 
-  def Max(self):
-    return numpy.max(self.samples)
+    def Max(self):
+        return numpy.max(self.samples)
 
 
 def GrabCpuSamples(sample_count):
-  print 'Label for snapshot (enter to quit): '
-  label = raw_input().strip()
-  if len(label) == 0:
-    return None
+    print 'Label for snapshot (enter to quit): '
+    label = raw_input().strip()
+    if len(label) == 0:
+        return None
 
-  snapshot = CpuSnapshot(label)
-  snapshot.Capture(sample_count)
+    snapshot = CpuSnapshot(label)
+    snapshot.Capture(sample_count)
 
-  return snapshot
+    return snapshot
 
 
 def main():
-  print 'How many seconds to capture per snapshot (enter for 60)?'
-  sample_count = raw_input().strip()
-  if len(sample_count) > 0 and int(sample_count) > 0:
-    sample_count = int(sample_count)
-  else:
-    print 'Defaulting to 60 samples.'
-    sample_count = 60
+    print 'How many seconds to capture per snapshot (enter for 60)?'
+    sample_count = raw_input().strip()
+    if len(sample_count) > 0 and int(sample_count) > 0:
+        sample_count = int(sample_count)
+    else:
+        print 'Defaulting to 60 samples.'
+        sample_count = 60
 
-  snapshots = []
-  while True:
-    snapshot = GrabCpuSamples(sample_count)
-    if snapshot is None:
-      break
-    snapshots.append(snapshot)
+    snapshots = []
+    while True:
+        snapshot = GrabCpuSamples(sample_count)
+        if snapshot is None:
+            break
+        snapshots.append(snapshot)
 
-  if len(snapshots) == 0:
-    print 'no samples captured'
-    return -1
+    if len(snapshots) == 0:
+        print 'no samples captured'
+        return -1
 
-  pyplot.title('CPU usage')
+    pyplot.title('CPU usage')
 
-  for s in snapshots:
-    pyplot.plot(s.samples, label=s.Text(), linewidth=2)
+    for s in snapshots:
+        pyplot.plot(s.samples, label=s.Text(), linewidth=2)
 
-  pyplot.legend()
+    pyplot.legend()
+
+    pyplot.show()
+    return 0
 
-  pyplot.show()
-  return 0
 
 if __name__ == '__main__':
-  sys.exit(main())
+    sys.exit(main())