Enable pep8 on ./tools directory

This patch fixes the pep8 issues of the tool scripts and
configures tox to run pep8 on the tools directory.

Change-Id: Ifed21e19dd2b382790a1e2a90d5153a8845c4b64

tools/lintstack.py

@@ -17,13 +17,14 @@
 
 """pylint error checking."""
 
+from __future__ import print_function
+
 import json
 import re
 import sys
 
 from pylint import lint
-from pylint.reporters import text
+from six.moves import cStringIO as StringIO  # noqa
-from six.moves import cStringIO as StringIO
 
 # These variables will be useful if we will need to skip some pylint checks
 ignore_codes = []
@@ -65,8 +66,9 @@ class LintOutput(object):
 
     @classmethod
     def from_msg_to_dict(cls, msg):
-        """From the output of pylint msg, to a dict, where each key
+        """From the output of pylint msg, to a dict.
-        is a unique error identifier, value is a list of LintOutput
+
+        Each key is a unique error identifier, value is a list of LintOutput
         """
         result = {}
         for line in msg.splitlines():
@@ -108,9 +110,9 @@ class ErrorKeys(object):
 
     @classmethod
     def print_json(cls, errors, output=sys.stdout):
-        print >>output, "# automatically generated by tools/lintstack.py"
+        print("# automatically generated by tools/lintstack.py", file=output)
         for i in sorted(errors.keys()):
-            print >>output, json.dumps(i)
+            print(json.dumps(i), file=output)
 
     @classmethod
     def from_file(cls, filename):
@@ -134,7 +136,7 @@ def run_pylint():
 
 
 def generate_error_keys(msg=None):
-    print "Generating", KNOWN_PYLINT_EXCEPTIONS_FILE
+    print("Generating", KNOWN_PYLINT_EXCEPTIONS_FILE)
     if msg is None:
         msg = run_pylint()
     errors = LintOutput.from_msg_to_dict(msg)
@@ -143,10 +145,10 @@ def generate_error_keys(msg=None):
 
 
 def validate(newmsg=None):
-    print "Loading", KNOWN_PYLINT_EXCEPTIONS_FILE
+    print("Loading", KNOWN_PYLINT_EXCEPTIONS_FILE)
     known = ErrorKeys.from_file(KNOWN_PYLINT_EXCEPTIONS_FILE)
     if newmsg is None:
-        print "Running pylint. Be patient..."
+        print("Running pylint. Be patient...")
         newmsg = run_pylint()
     errors = LintOutput.from_msg_to_dict(newmsg)
 
@@ -156,17 +158,17 @@ def validate(newmsg=None):
     for err_key, err_list in errors.items():
         for err in err_list:
             if err_key not in known:
-                print err.lintoutput
+                print(err.lintoutput)
-                print
+                print()
                 passed = False
     if passed:
-        print "Congrats! pylint check passed."
+        print("Congrats! pylint check passed.")
         redundant = known - set(errors.keys())
         if redundant:
-            print "Extra credit: some known pylint exceptions disappeared."
+            print("Extra credit: some known pylint exceptions disappeared.")
             for i in sorted(redundant):
-                print json.dumps(i)
+                print(json.dumps(i))
-            print "Consider regenerating the exception file if you will."
+            print("Consider regenerating the exception file if you will.")
     else:
         print("Please fix the errors above. If you believe they are false"
               " positives, run 'tools/lintstack.py generate' to overwrite.")
@@ -174,10 +176,10 @@ def validate(newmsg=None):
 
 
 def usage():
-    print """Usage: tools/lintstack.py [generate|validate]
+    print("""Usage: tools/lintstack.py [generate|validate]
     To generate pylint_exceptions file: tools/lintstack.py generate
     To validate the current commit: tools/lintstack.py
-    """
+    """)
 
 
 def main():

tools/make_test_data.py

@@ -56,7 +56,6 @@ def make_test_data(conn, name, meter_type, unit, volume, random_min,
 
     increment = datetime.timedelta(minutes=interval)
 
-
     print('Adding new events for meter %s.' % (name))
     # Generate events
     n = 0
@@ -70,7 +69,6 @@ def make_test_data(conn, name, meter_type, unit, volume, random_min,
             else:
                 total_volume += random.uniform(random_min, random_max)
 
-
         c = sample.Sample(name=name,
                           type=meter_type,
                           unit=unit,

tools/make_test_event_data.py

@@ -121,8 +121,7 @@ def main():
                    start=start,
                    end=end,
                    interval=args.interval,
-                   event_types=args.event_types
+                   event_types=args.event_types)
-    )
 
 
 if __name__ == '__main__':

tools/show_data.py

@@ -53,9 +53,8 @@ def show_resources(db, args):
                     value = totals[0]['max']
                 else:
                     value = totals[0]['sum']
-                print('    %s (%s): %s' % \
+                print('    %s (%s): %s' %
-                     (meter['counter_name'], meter['counter_type'],
+                      (meter['counter_name'], meter['counter_type'], value))
-                      value))
 
 
 def show_total_resources(db, args):

tools/test_hbase_table_utils.py

@@ -17,6 +17,7 @@ from oslo.config import cfg
 
 from ceilometer import storage
 
+
 def main(argv):
     cfg.CONF([], project='ceilometer')
     if os.getenv("CEILOMETER_TEST_HBASE_URL"):

tox.ini

@@ -70,7 +70,7 @@ commands =
 [flake8]
 ignore =
 builtins = _
-exclude=.venv,.git,.tox,dist,doc,./ceilometer/openstack/common,*lib/python*,*egg,tools,nova_tests,build
+exclude=.venv,.git,.tox,dist,doc,./ceilometer/openstack/common,*lib/python*,*egg,nova_tests,build
 show-source = True
 
 [hacking]