test_sqlthread codestyle refactoring

src/tests/test_sqlthread.py

@@ -36,6 +36,7 @@ class TestSqlBase(object):  # pylint: disable=E1101, too-few-public-methods, E10
         self.test_db.initialize_schema()
 
     def get_table_schema(self, table_name):
+        """Get table list of column names and value types by table name"""
         self.test_db.cur.execute("""PRAGMA table_info({})""".format(table_name))
         res = self.test_db.cur.fetchall()
         res = [[x[1], x[2]] for x in res]
@@ -216,6 +217,7 @@ class TestUpgradeBitmessageDB(TestSqlBase, unittest.TestCase):  # pylint: disabl
         self._setup_db()
         self.test_db.cur.execute('''INSERT INTO settings VALUES('version','2')''')
 
+
     def version(self):
         """
             Run SQL Scripts, Initialize DB with respect to versioning