RF: primarily flake8 lints + minor RF to reduce duplication in PATHEXT

I did keep some "bare" except with catch all Exception: , while tried to disable
flake8 complaints where clearly all exceptions are to be catched

10 files changed, 53 insertions, 56 deletions

diff --git a/git/compat.py b/git/compat.py
index b8045857..b63768f3 100644
--- a/git/compat.py
+++ b/git/compat.py
@@ -309,5 +309,5 @@ def register_surrogateescape():
 
 try:
     b"100644 \x9f\0aaa".decode(defenc, "surrogateescape")
-except:
+except Exception:
     register_surrogateescape()
diff --git a/git/diff.py b/git/diff.py
index 16c782f3..28c10e49 100644
--- a/git/diff.py
+++ b/git/diff.py
@@ -313,20 +313,20 @@ class Diff(object):
             h %= self.b_blob.path
 
         msg = ''
-        l = None    # temp line
-        ll = 0      # line length
+        line = None          # temp line
+        line_length = 0      # line length
         for b, n in zip((self.a_blob, self.b_blob), ('lhs', 'rhs')):
             if b:
-                l = "\n%s: %o | %s" % (n, b.mode, b.hexsha)
+                line = "\n%s: %o | %s" % (n, b.mode, b.hexsha)
             else:
-                l = "\n%s: None" % n
+                line = "\n%s: None" % n
             # END if blob is not None
-            ll = max(len(l), ll)
-            msg += l
+            line_length = max(len(line), line_length)
+            msg += line
         # END for each blob
 
         # add headline
-        h += '\n' + '=' * ll
+        h += '\n' + '=' * line_length
 
         if self.deleted_file:
             msg += '\nfile deleted in rhs'
diff --git a/git/exc.py b/git/exc.py
index a737110c..5c5aa2b4 100644
--- a/git/exc.py
+++ b/git/exc.py
@@ -48,7 +48,7 @@ class CommandError(UnicodeMixin, GitError):
             else:
                 try:
                     status = u'exit code(%s)' % int(status)
-                except:
+                except ValueError:
                     s = safe_decode(str(status))
                     status = u"'%s'" % s if isinstance(status, string_types) else s
 
diff --git a/git/refs/log.py b/git/refs/log.py
index 623a63db..1c085ef1 100644
--- a/git/refs/log.py
+++ b/git/refs/log.py
@@ -246,7 +246,7 @@ class RefLog(list, Serializable):
         try:
             self._serialize(fp)
             lfd.commit()
-        except:
+        except Exception:
             # on failure it rolls back automatically, but we make it clear
             lfd.rollback()
             raise
diff --git a/git/remote.py b/git/remote.py
index 35460f5a..813566a2 100644
--- a/git/remote.py
+++ b/git/remote.py
@@ -542,9 +542,11 @@ class Remote(LazyMixin, Iterable):
                         if '  Push  URL:' in line:
                             yield line.split(': ')[-1]
                 except GitCommandError as ex:
-                    if any([msg in str(ex) for msg in ['correct access rights','cannot run ssh']]):
-                        # If ssh is not setup to access this repository, see issue 694                                                                                            
-                        result = Git().execute(['git','config','--get','remote.%s.url' % self.name])
+                    if any([msg in str(ex) for msg in ['correct access rights', 'cannot run ssh']]):
+                        # If ssh is not setup to access this repository, see issue 694
+                        result = Git().execute(
+                            ['git', 'config', '--get', 'remote.%s.url' % self.name]
+                        )
                         yield result
                     else:
                         raise ex
diff --git a/git/repo/base.py b/git/repo/base.py
index 990def64..2fbae012 100644
--- a/git/repo/base.py
+++ b/git/repo/base.py
@@ -203,7 +203,7 @@ class Repo(object):
     def __del__(self):
         try:
             self.close()
-        except:
+        except Exception:
             pass
 
     def close(self):
diff --git a/git/test/lib/helper.py b/git/test/lib/helper.py
index 729c76a4..ff337f29 100644
--- a/git/test/lib/helper.py
+++ b/git/test/lib/helper.py
@@ -139,7 +139,7 @@ def with_rw_repo(working_tree_ref, bare=False):
             try:
                 try:
                     return func(self, rw_repo)
-                except:
+                except:  # noqa E722
                     log.info("Keeping repo after failure: %s", repo_dir)
                     repo_dir = None
                     raise
@@ -227,7 +227,7 @@ def with_rw_and_rw_remote_repo(working_tree_ref):
     Same as with_rw_repo, but also provides a writable remote repository from which the
     rw_repo has been forked as well as a handle for a git-daemon that may be started to
     run the remote_repo.
-    The remote repository was cloned as bare repository from the rorepo, whereas
+    The remote repository was cloned as bare repository from the ro repo, whereas
     the rw repo has a working tree and was cloned from the remote repository.
 
     remote_repo has two remotes: origin and daemon_origin. One uses a local url,
@@ -296,7 +296,7 @@ def with_rw_and_rw_remote_repo(working_tree_ref):
                     with cwd(rw_repo.working_dir):
                         try:
                             return func(self, rw_repo, rw_daemon_repo)
-                        except:
+                        except:  # noqa E722
                             log.info("Keeping repos after failure: \n  rw_repo_dir: %s \n  rw_daemon_repo_dir: %s",
                                      rw_repo_dir, rw_daemon_repo_dir)
                             rw_repo_dir = rw_daemon_repo_dir = None
diff --git a/git/test/test_submodule.py b/git/test/test_submodule.py
index f970dd2c..5c8a2798 100644
--- a/git/test/test_submodule.py
+++ b/git/test/test_submodule.py
@@ -920,4 +920,4 @@ class TestSubmodule(TestBase):
         submodule_path = 'D:\\submodule_path'
         relative_path = Submodule._to_relative_path(super_repo, submodule_path)
         msg = '_to_relative_path should be "submodule_path" but was "%s"' % relative_path
-        assert relative_path == 'submodule_path', msg
\ No newline at end of file
+        assert relative_path == 'submodule_path', msg
diff --git a/git/test/test_util.py b/git/test/test_util.py
index 525c8609..d30c8376 100644
--- a/git/test/test_util.py
+++ b/git/test/test_util.py
@@ -217,49 +217,49 @@ class TestUtils(TestBase):
     @ddt.data(('name', ''), ('name', 'prefix_'))
     def test_iterable_list(self, case):
         name, prefix = case
-        l = IterableList(name, prefix)
+        ilist = IterableList(name, prefix)
 
         name1 = "one"
         name2 = "two"
         m1 = TestIterableMember(prefix + name1)
         m2 = TestIterableMember(prefix + name2)
 
-        l.extend((m1, m2))
+        ilist.extend((m1, m2))
 
-        self.assertEqual(len(l), 2)
+        self.assertEqual(len(ilist), 2)
 
         # contains works with name and identity
-        self.assertIn(name1, l)
-        self.assertIn(name2, l)
-        self.assertIn(m2, l)
-        self.assertIn(m2, l)
-        self.assertNotIn('invalid', l)
+        self.assertIn(name1, ilist)
+        self.assertIn(name2, ilist)
+        self.assertIn(m2, ilist)
+        self.assertIn(m2, ilist)
+        self.assertNotIn('invalid', ilist)
 
         # with string index
-        self.assertIs(l[name1], m1)
-        self.assertIs(l[name2], m2)
+        self.assertIs(ilist[name1], m1)
+        self.assertIs(ilist[name2], m2)
 
         # with int index
-        self.assertIs(l[0], m1)
-        self.assertIs(l[1], m2)
+        self.assertIs(ilist[0], m1)
+        self.assertIs(ilist[1], m2)
 
         # with getattr
-        self.assertIs(l.one, m1)
-        self.assertIs(l.two, m2)
+        self.assertIs(ilist.one, m1)
+        self.assertIs(ilist.two, m2)
 
         # test exceptions
-        self.failUnlessRaises(AttributeError, getattr, l, 'something')
-        self.failUnlessRaises(IndexError, l.__getitem__, 'something')
+        self.failUnlessRaises(AttributeError, getattr, ilist, 'something')
+        self.failUnlessRaises(IndexError, ilist.__getitem__, 'something')
 
         # delete by name and index
-        self.failUnlessRaises(IndexError, l.__delitem__, 'something')
-        del(l[name2])
-        self.assertEqual(len(l), 1)
-        self.assertNotIn(name2, l)
-        self.assertIn(name1, l)
-        del(l[0])
-        self.assertNotIn(name1, l)
-        self.assertEqual(len(l), 0)
-
-        self.failUnlessRaises(IndexError, l.__delitem__, 0)
-        self.failUnlessRaises(IndexError, l.__delitem__, 'something')
+        self.failUnlessRaises(IndexError, ilist.__delitem__, 'something')
+        del(ilist[name2])
+        self.assertEqual(len(ilist), 1)
+        self.assertNotIn(name2, ilist)
+        self.assertIn(name1, ilist)
+        del(ilist[0])
+        self.assertNotIn(name1, ilist)
+        self.assertEqual(len(ilist), 0)
+
+        self.failUnlessRaises(IndexError, ilist.__delitem__, 0)
+        self.failUnlessRaises(IndexError, ilist.__delitem__, 'something')
diff --git a/git/util.py b/git/util.py
index 5baeee91..18c28fd1 100644
--- a/git/util.py
+++ b/git/util.py
@@ -188,20 +188,15 @@ def assure_directory_exists(path, is_file=False):
 
 
 def _get_exe_extensions():
-    try:
-        winprog_exts = tuple(p.upper() for p in os.environ['PATHEXT'].split(os.pathsep))
-    except:
-        winprog_exts = ('.BAT', 'COM', '.EXE')
-
-    return winprog_exts
+    PATHEXT = os.environ.get('PATHEXT', None)
+    return tuple(p.upper() for p in PATHEXT.split(os.pathsep)) \
+        if PATHEXT \
+        else (('.BAT', 'COM', '.EXE') if is_win else ())
 
 
 def py_where(program, path=None):
     # From: http://stackoverflow.com/a/377028/548792
-    try:
-        winprog_exts = tuple(p.upper() for p in os.environ['PATHEXT'].split(os.pathsep))
-    except:
-        winprog_exts = is_win and ('.BAT', 'COM', '.EXE') or ()
+    winprog_exts = _get_exe_extensions()
 
     def is_exec(fpath):
         return osp.isfile(fpath) and os.access(fpath, os.X_OK) and (
@@ -347,7 +342,7 @@ def expand_path(p, expand_vars=True):
         if expand_vars:
             p = osp.expandvars(p)
         return osp.normpath(osp.abspath(p))
-    except:
+    except Exception:
         return None
 
 #} END utilities