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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def check_command(self, name):
 """ Checks whether the given Django management command exists, excluding this command from the search. """

        if not check_command(
            name, 
            exclude_packages=self.get_exclude_packages(),
            exclude_command_class=self.__class__):
            raise management.CommandError(
                "The management command \"{name:s}\" is not available. "
                "Please ensure that you've added the application with "
                "the \"{name:s}\" command to your INSTALLED_APPS "
                "setting".format(
                    name=name))