<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_dialect(self):
 """Return the SQLAlchemy database dialect class corresponding to this URL's driver name. """


        if "+" not in self.drivername:
            name = self.drivername
        else:
            name = self.drivername.replace("+", ".")
        cls = registry.load(name)
        # check for legacy dialects that
        # would return a module with 'dialect' as the
        # actual class
        if (
            hasattr(cls, "dialect")
            and isinstance(cls.dialect, type)
            and issubclass(cls.dialect, Dialect)
        ):
            return cls.dialect
        else:
            return cls