<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def override_config(self, options):
 """Override the default configuration."""


        for k, v in options.items():
            # Reject names not in the default configuration
            if k not in self.config:
                raise KeyError("'{}' is not a valid option for '{}'".format(k, self.__class__.__name__))
            self.validate_options(k, v)
            self.config[k] = v