settings_checker.py

def check_setting(param_name):
    """
    Simple decorator to disable pipeline for spiders with some attributes
    
    ```
    class A:
        f_enabled = True
        @check_setting('f_enabled')
        def f(self, times):
            print(' '.join(['hey!'] * times))
    ```

    :param param_name: class attribute which must be checked

    """
    def func_wrapper(func):
        def wrapper(self, *args, **kwargs):
            if getattr(self, param_name):
                return func(self, *args, **kwargs)
            return
        return wrapper
    return func_wrapper