Database features. Development has started.

database.py

@@ -0,0 +1,41 @@
+import datetime as dt
+
+class DataBase:
+    def __init__(self, basefile, scheme):
+        import sqlite3
+        self.scheme = ''
+        try:
+            self.conn = sqlite3.connect(basefile, check_same_thread=False)
+        except:
+            print('Could not connect to DataBase.')
+            return None
+        with open(scheme, 'r') as scheme_sql:
+            sql = scheme_sql.read()
+            self.scheme = sql
+            if self.conn is not None:
+                try:
+                    cursor = self.conn.cursor()
+                    cursor.executescript(sql)
+                except:
+                    print('Could not create scheme.')
+            else:
+                print("Error! cannot create the database connection.")
+        print('DB created.')
+
+    def execute(self, sql):
+        cursor = self.conn.cursor()
+        cursor.execute(sql)
+        self.conn.commit()
+        return cursor.fetchall()
+
+    def update_user(self, user_name, user_id):
+        date = int(dt.datetime.now().strftime("%s"))
+        sql = """INSERT OR IGNORE INTO 
+        users('user_id', 'user_name', 'date') 
+        VALUES ('%s','%s','%s')""" % (
+            user_id,
+            user_name,
+            date
+        )
+        self.execute(sql)
+