base.py 文件源码

def filter_chain(filters, token, func, *args, **kwargs):
    if token == -1:
        return func()
    else:
        def _inner_method():
            fm = filters[token]
            fargs = getargspec(fm)[0]
            if len(fargs) == 1:
                # Only self arg
                result = func()
                if result is None:
                    return fm()
                else:
                    raise IncorrectPluginArg(u'Plugin filter method need a arg to receive parent method result.')
            else:
                return fm(func if fargs[1] == '__' else func(), *args, **kwargs)
        return filter_chain(filters, token - 1, _inner_method, *args, **kwargs)