Fix more pylint warnings.

BUG=none
TEST=All modified files are pylint clean. All unit tests pass.

Change-Id: I0a85ea2360cca776dd3ec60a8bcc11cdf791e776
Reviewed-on: https://gerrit.chromium.org/gerrit/39716
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Ryan Cui <rcui@chromium.org>
Commit-Ready: David James <davidjames@chromium.org>
Tested-by: David James <davidjames@chromium.org>
diff --git a/scripts/cbuildbot.py b/scripts/cbuildbot.py
index 9964dfd..d09516b 100644
--- a/scripts/cbuildbot.py
+++ b/scripts/cbuildbot.py
@@ -14,7 +14,6 @@
 import errno
 import glob
 import logging
-import multiprocessing
 import optparse
 import os
 import pprint
diff --git a/scripts/chrome_set_ver.py b/scripts/chrome_set_ver.py
index a0879e8..8802d78 100644
--- a/scripts/chrome_set_ver.py
+++ b/scripts/chrome_set_ver.py
@@ -52,11 +52,11 @@
         return self._local_scope['vars'][var_name]
       raise Exception('Var is not defined: %s' % var_name)
 
-  locals = {}
-  var = _VarImpl({}, locals)
-  globals = {'From': FromImpl, 'Var': var.Lookup, 'deps_os': {}}
-  exec(deps_content) in globals, locals
-  return locals
+  my_locals = {}
+  var = _VarImpl({}, my_locals)
+  my_globals = {'From': FromImpl, 'Var': var.Lookup, 'deps_os': {}}
+  exec(deps_content) in my_globals, my_locals
+  return my_locals
 
 
 def _CreateCrosSymlink(repo_root):
diff --git a/scripts/cros_enable_push.py b/scripts/cros_enable_push.py
index e4f447c..e4954e3 100644
--- a/scripts/cros_enable_push.py
+++ b/scripts/cros_enable_push.py
@@ -12,10 +12,10 @@
 
 
 def _Usage(handle):
-  print >>handle, (
+  print >> handle, (
      "Tool to fix git configuration and add push configuration to a repo.")
-  print >>handle
-  print >>handle, (
+  print >> handle
+  print >> handle, (
 """Fix git configuration, and enable git pushing to the remote.
 
 To run this script, either invoke it from within a repo checkout, or pass it
@@ -39,7 +39,7 @@
     path = git.FindRepoCheckoutRoot()
     if path is None:
       _Usage(sys.stderr)
-      print >>sys.stderr, "We're not in a repo checkout."
+      print >> sys.stderr, "We're not in a repo checkout."
       return 1
   else:
     if argv[0] in ('-h', '--help', '--usage'):
@@ -48,7 +48,7 @@
     path = argv[0]
     if not repository.IsARepoRoot(path):
       _Usage(sys.stderr)
-      print >>sys.stderr, ("Path %s doesn't point to the root of a repository."
+      print >> sys.stderr, ("Path %s doesn't point to the root of a repository."
                            % (argv[0],))
       return 1
 
diff --git a/scripts/cros_env_whitelist.py b/scripts/cros_env_whitelist.py
index 5f6890f..21382b7 100644
--- a/scripts/cros_env_whitelist.py
+++ b/scripts/cros_env_whitelist.py
@@ -9,5 +9,5 @@
 from chromite.buildbot import constants
 
 
-def main(argv):
+def main(_argv):
   print ' '.join(constants.CHROOT_ENVIRONMENT_WHITELIST)
diff --git a/scripts/cros_generate_local_binhosts.py b/scripts/cros_generate_local_binhosts.py
index 9f014b2..bb014d9 100644
--- a/scripts/cros_generate_local_binhosts.py
+++ b/scripts/cros_generate_local_binhosts.py
@@ -73,7 +73,7 @@
       by_compatibility[compat_id].add(other_board)
 
   if compatible_boards is None:
-    print >>sys.stderr, "Missing portageq wrapper for %s" % flags.board
+    print >> sys.stderr, "Missing portageq wrapper for %s" % flags.board
     sys.exit(1)
 
   # If a non-generic prebuilt is available, ignore the generic ones,
diff --git a/scripts/merge_package_status.py b/scripts/merge_package_status.py
index 751dc16..a675a68 100644
--- a/scripts/merge_package_status.py
+++ b/scripts/merge_package_status.py
@@ -10,7 +10,6 @@
 import optparse
 import os
 import re
-import sys
 
 from chromite.lib import operation
 from chromite.lib import table
diff --git a/scripts/merge_package_status_unittest.py b/scripts/merge_package_status_unittest.py
index fa94978..23cd2b2 100644
--- a/scripts/merge_package_status_unittest.py
+++ b/scripts/merge_package_status_unittest.py
@@ -9,8 +9,6 @@
 import exceptions
 import mox
 import os
-import re
-import sys
 import tempfile
 
 from chromite.lib import cros_test_lib
diff --git a/scripts/upload_package_status.py b/scripts/upload_package_status.py
index 762d2e2..e614962 100644
--- a/scripts/upload_package_status.py
+++ b/scripts/upload_package_status.py
@@ -7,7 +7,6 @@
 
 import optparse
 import os
-import sys
 
 from chromite.lib import gdata_lib
 from chromite.lib import table
@@ -296,6 +295,3 @@
   # write auth_token out to that location.
   if options.token_file:
     creds.StoreAuthTokenIfNeeded(options.token_file)
-
-if __name__ == '__main__':
-  main()