Fix pylint and flake8 for SQL work.

Vanity commit. This also touches up a few comments.

qutebrowser/browser/history.py

@@ -36,7 +36,7 @@ class Entry:
     Attributes:
         atime: The time the page was accessed.
         url: The URL which was accessed as QUrl.
-        redirect: If True, don't save this entry to disk
+        redirect: If True, don't show this entry in completion
     """
 
     def __init__(self, atime, url, title, redirect=False):

qutebrowser/completion/models/sqlmodel.py

@@ -22,13 +22,13 @@
 import re
 
 from PyQt5.QtCore import Qt, QModelIndex, QAbstractItemModel
-from PyQt5.QtSql import QSqlQuery, QSqlQueryModel, QSqlDatabase
+from PyQt5.QtSql import QSqlQueryModel
 
 from qutebrowser.utils import log
 from qutebrowser.misc import sql
 
 
-class SqlCompletionCategory(QSqlQueryModel):
+class _SqlCompletionCategory(QSqlQueryModel):
     def __init__(self, name, sort_by, sort_order, limit, select, where,
                  columns_to_filter, parent=None):
         super().__init__(parent=parent)
@@ -105,10 +105,10 @@ class SqlCompletionModel(QAbstractItemModel):
 
         Return: A new CompletionCategory.
         """
-        cat = SqlCompletionCategory(name, parent=self, sort_by=sort_by,
-                                    sort_order=sort_order, limit=limit,
-                                    select=select, where=where,
-                                    columns_to_filter=self.columns_to_filter)
+        cat = _SqlCompletionCategory(name, parent=self, sort_by=sort_by,
+                                     sort_order=sort_order, limit=limit,
+                                     select=select, where=where,
+                                     columns_to_filter=self.columns_to_filter)
         self._categories.append(cat)
 
     def data(self, index, role=Qt.DisplayRole):

qutebrowser/completion/models/urlmodel.py

@@ -39,13 +39,13 @@ def _delete_url(completion):
     category = index.parent()
     index = category.child(index.row(), _URLCOL)
     catname = category.data()
-    url = index.data()
     qtutils.ensure_valid(category)
 
     if catname == 'Bookmarks':
-        log.completion.debug('Deleting bookmark {}'.format(url))
+        urlstr = index.data()
+        log.completion.debug('Deleting bookmark {}'.format(urlstr))
         bookmark_manager = objreg.get('bookmark-manager')
-        bookmark_manager.delete(url)
+        bookmark_manager.delete(urlstr)
     else:
         assert catname == 'Quickmarks', 'Unknown category {}'.format(catname)
         quickmark_manager = objreg.get('quickmark-manager')

qutebrowser/misc/sql.py

@@ -65,6 +65,7 @@ class SqlTable(QObject):
     """Interface to a sql table.
 
     Attributes:
+        Entry: The class wrapping row data from this table.
         _name: Name of the SQL table this wraps.
         _primary_key: The primary key of the table.
 
@@ -87,8 +88,9 @@ class SqlTable(QObject):
         super().__init__(parent)
         self._name = name
         self._primary_key = primary_key
-        run_query("CREATE TABLE {} ({}, PRIMARY KEY ({}))"
-                   .format(name, ','.join(fields), primary_key))
+        run_query("CREATE TABLE {} ({}, PRIMARY KEY ({}))".format(
+            name, ','.join(fields), primary_key))
+        # pylint: disable=invalid-name
         self.Entry = collections.namedtuple(name + '_Entry', fields)
 
     def __iter__(self):
@@ -104,8 +106,8 @@ class SqlTable(QObject):
         Args:
             key: Primary key value to search for.
         """
-        query = run_query("SELECT * FROM {} where {} = ?"
-                           .format(self._name, self._primary_key), [key])
+        query = run_query("SELECT * FROM {} where {} = ?".format(
+            self._name, self._primary_key), [key])
         return query.next()
 
     def __len__(self):
@@ -120,8 +122,8 @@ class SqlTable(QObject):
         Args:
             key: Primary key value to fetch.
         """
-        result = run_query("SELECT * FROM {} where {} = ?"
-                            .format(self._name, self._primary_key), [key])
+        result = run_query("SELECT * FROM {} where {} = ?".format(
+            self._name, self._primary_key), [key])
         result.next()
         rec = result.record()
         return self.Entry(*[rec.value(i) for i in range(rec.count())])
@@ -137,8 +139,8 @@ class SqlTable(QObject):
             The number of rows deleted.
         """
         field = field or self._primary_key
-        query = run_query("DELETE FROM {} where {} = ?"
-                           .format(self._name, field), [value])
+        query = run_query("DELETE FROM {} where {} = ?".format(
+            self._name, field), [value])
         if not query.numRowsAffected():
             raise KeyError('No row with {} = "{}"'.format(field, value))
         self.changed.emit()
@@ -152,8 +154,8 @@ class SqlTable(QObject):
         """
         cmd = "REPLACE" if replace else "INSERT"
         paramstr = ','.join(['?'] * len(values))
-        run_query("{} INTO {} values({})"
-                   .format(cmd, self._name, paramstr), values)
+        run_query("{} INTO {} values({})".format(cmd, self._name, paramstr),
+            values)
         self.changed.emit()
 
     def delete_all(self):

tests/unit/completion/test_completer.py

@@ -36,7 +36,7 @@ class FakeCompletionModel(QStandardItemModel):
     def __init__(self, kind, *pos_args, parent=None):
         super().__init__(parent)
         self.kind = kind
-        self.pos_args = [*pos_args]
+        self.pos_args = list(pos_args)
 
 
 class CompletionWidgetStub(QObject):

tests/unit/completion/test_sqlmodel.py

@@ -232,6 +232,7 @@ def test_where():
     model.new_category('test_where', where='not c')
     _check_model(model, [('test_where', [('foo', 'bar', False)])])
 
+
 def test_entry():
     table = sql.SqlTable('test_entry', ['a', 'b', 'c'], primary_key='a')
     assert hasattr(table.Entry, 'a')