(1)MySql:server=localhost;DataBase=SkyBlue;user=sa;password=123456;port=3306;SslMode=None
(2)SqlServer:data source=LOCALHOST;initial catalog=BlueShieldCollege;persist security info=True;user id=sa;password=123456;
(3)
(1)MySql:server=localhost;DataBase=SkyBlue;user=sa;password=123456;port=3306;SslMode=None
(2)SqlServer:data source=LOCALHOST;initial catalog=BlueShieldCollege;persist security info=True;user id=sa;password=123456;
(3)
def ADD(a): print(3,a,hex(id(a))) a.remove(2) print(3,a,hex(id(a))) a=a.append(10)