human
Solve the following python programming problem given the following code:
def _step_decorator(step_type, step_name, converters = None, scope = 'function', target_fixture = None) : 
    "Step decorator for the type and the name.

    :param str step_type: Step type (GIVEN, WHEN or THEN).
    :param str step_name: Step name as in the feature file.
    :param dict converters: Optional step arguments converters mapping
    :param str scope: Optional step definition fixture scope
    :param target_fixture: Optional fixture name to replace by step definition

    :return: Decorator function for the step.

    :raise: StepError if the function doesn't take group names as parameters.

    :note: If the step type is GIVEN it will automatically apply the pytest
           fixture decorator to the step function.
    " 
    def decorator(func) : 
        step_func = func 
        parser_instance = get_parser (step_name) 
        parsed_step_name = parser_instance.name 
        if (step_type == GIVEN) : 
            if (not hasattr (func, '_pytestfixturefunction')) : 
                func = pytest.fixture (scope = scope) (func) 
def step_func(request) : 
                result = request.getfuncargvalue (func.__name__) 
                if target_fixture : 
                    inject_fixture (request, target_fixture, result) 
return result 
step_func.__doc__ = func.__doc__ 
            step_func.fixture = func.__name__ 
step_func.__name__ = force_encode (parsed_step_name) 
        @ pytest.fixture (scope = scope) 
        def lazy_step_func() : 
            return step_func 
step_func.step_type = step_type 
        lazy_step_func = contribute_to_module (get_caller_module (), get_step_fixture_name (parsed_step_name, step_type), lazy_step_func) 
        lazy_step_func.step_type = step_type 
        lazy_step_func.__doc__ = func.__doc__ 
        step_func.parser = lazy_step_func.parser = parser_instance 
        if converters : 
            step_func.converters = lazy_step_func.converters = converters 
return func 
return step_name 

    
    

    Fix the buggy line: return step_name
assistant
#Here is Python code to fix the buggy line: return step_name
.

return def decorator(