Fix flake8 compliants in tools python programs.

Change-Id: I59feb2824fce16d23d56833fd51e4814a0e641cf

tools/git-changelog

@@ -14,9 +14,9 @@ import argparse
 import collections
 import iso8601
 import logging
-import re
 import os
 import os.path
+import re
 import subprocess
 import sys
 import textwrap

tools/multipip

@@ -3,14 +3,12 @@
 import argparse
 import distutils.spawn
 import logging
-import os
 import re
 import subprocess
 import sys
 
 import pip.index
 import pip.req
-from pip.vcs import git, mercurial, subversion, bazaar
 import pkg_resources
 
 
@@ -201,13 +199,10 @@ def join_one_requirement(req_list):
     """
     if len(req_list) == 1:
         return req_list[0]
-    req_strict = None
     lower_bound_str = None
     lower_bound_version = None
-    lower_bound_req = None
     upper_bound_str = None
     upper_bound_version = None
-    upper_bound_req = None
     conflicts = []
     for req in req_list:
         for spec in req.req.specs:
@@ -225,15 +220,13 @@ def join_one_requirement(req_list):
                     (strict_check and version == lower_bound_version)):
                     lower_bound_version = version
                     lower_bound_str = spec_str
-                    lower_bound_req = req
             else:
                 if (not upper_bound_version or (version < upper_bound_version) or
                     (strict_check and version == upper_bound_version)):
                     upper_bound_version = version
                     upper_bound_str = spec_str
-                    upper_bound_req = req
+    req_key = req_list[0].req.key
     if lower_bound_version and upper_bound_version:
-        bad_bounds = False
         if lower_bound_version > upper_bound_version:
             upper_bound_str = None
         if lower_bound_version == upper_bound_version:
@@ -244,7 +237,6 @@ def join_one_requirement(req_list):
             else:
                 upper_bound_str = None
     req_specs = []
-    req_key = req_list[0].req.key
     if lower_bound_str:
         req_specs.append(lower_bound_str)
     if upper_bound_str:
@@ -304,7 +296,7 @@ def join_requirements(options):
                 conflicts.append(parsed)
         if exact_version:
             for req in req_list:
-                if not exact_version in req.req:
+                if exact_version not in req.req:
                     incompatible_requirement(joined_req, req)
         else:
             for req in req_list:

tools/pip-download

@@ -16,7 +16,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from distutils.version import (StrictVersion, LooseVersion)
+from distutils.version import LooseVersion
+from distutils.version import StrictVersion
 
 import collections
 import distutils

tools/py2rpm

@@ -4,9 +4,9 @@ import argparse
 import distutils.spawn
 import email.parser
 import logging
-import re
 import os
 import os.path
+import re
 import shutil
 import subprocess
 import sys
@@ -58,6 +58,7 @@ mv -f INSTALLED_FILES{.tmp,}""",
     """rm -rf $RPM_BUILD_ROOT""",
 }
 
+
 class InstallationError(Exception):
     pass
 
@@ -70,7 +71,7 @@ def python_key_to_rpm(python_name):
     python_name = python_name.lower()
     try:
         return package_map[python_name]
-    except:
+    except KeyError:
         pass
     python_name = python_name.replace("_", "-").replace(".", "-")
     if python_name.startswith("python-"):
@@ -329,7 +330,7 @@ def requires_and_conflicts(req_list):
     for line in req_list:
         try:
             req = pkg_resources.Requirement.parse(line)
-        except:
+        except Exception:
             continue
         rpm_name = python_key_to_rpm(req.key)
         if not req.specs:
@@ -407,7 +408,7 @@ def build_rpm(options, filename):
     # flake8 v2 that we don't go ahead and build a v2.0 version.
     #
     # Note(harlowja): Not sure why rpm seems to not understand these are the same...
-    cleaned_version = trim_zeroes(version.replace('-','_'))
+    cleaned_version = trim_zeroes(version.replace('-', '_'))
     with open(spec_name, "w") as spec_file:
         print >> spec_file, "%define pkg_name", pkg_name
         print >> spec_file, "%define rpm_name", rpm_name

tools/yumfind

@@ -23,9 +23,7 @@ from optparse import OptionParser
 
 import collections
 import json
-import os
 import pkg_resources
-import sys
 
 from yum import YumBase