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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 discover_single_case(self, module, case_attributes):
 """Find and load a single TestCase or TestCase method from a module. Parameters module : module The imported Python module containing the TestCase to be loaded. case_attributes : list A list (length 1 or 2) of str. The first component must be the name of a TestCase subclass. The second component must be the name of a method in the TestCase. """

        # Find single case
        case = module
        loader = self._loader
        for index, component in enumerate(case_attributes):
            case = getattr(case, component, None)
            if case is None:
                return loader.create_suite()
            elif loader.is_test_case(case):
                rest = case_attributes[index + 1:]
                if len(rest) > 1:
                    raise ValueError('Too many components in module path')
                elif len(rest) == 1:
                    return loader.create_suite(
                        [loader.load_test(case, *rest)])
                return loader.load_case(case)

        # No cases matched, return empty suite
        return loader.create_suite()