Add query()

- Add query() to query db and return result as list of attributes
- Refactor row_string -> rows in create_table()
- Add method documentation

Database.py

@@ -10,24 +10,28 @@ class Database(object):
         self.conn.close()
     
     def create_table(self, name, row_list):
+        """creates table 'name' with rows from 'row_list' if it doesn't exist"""
+
         if self.table_exists(name):
             return True
         
         else:
-            row_string = ""
+            rows = ""
             separator = ", "
             for i in range(0, len(row_list)):
                 if i == len(row_list) - 1:
                     separator = ""
-                row_string += "%s%s" % (row_list[i], separator)
+                rows += "%s%s" % (row_list[i], separator)
             
-            self.conn.execute("CREATE TABLE %s(%s)" % (name, row_string))
+            self.conn.execute("CREATE TABLE %s(%s)" % (name, rows))
             if self.table_exists(name):
                 return True
             else:
                 return False
     
     def table_exists(self, name):
+        """returns true if table 'name' exists"""
+
         result = self.conn.execute("""SELECT * FROM sqlite_master
                     WHERE type='table' AND name=?""", (name,))
         if result.fetchone() is None:
@@ -45,3 +49,6 @@ class Database(object):
                                         log_entry.duration,
                                         log_entry.file_count))
             self.conn.commit()
+
+    def query(self, query):
+        return self.conn.execute(query).fetchall()