Python conditional decorator

conditional_decorator.py

class conditional_decorator(object):
    def __init__(self, dec, condition):
        self.decorator = dec
        self.condition = condition

    def __call__(self, func):
        if not self.condition:
            # Return the function unchanged, not decorated.
            return func
        return self.decorator(func)

# @functools.lru_cache(maxsize=256, typed=True)
@conditional_decorator(lambda func: functools.lru_cache(maxsize=256, typed=True)(func), hasattr(functools, 'lru_cache'))
def _compile_pattern(pat):
    return re.compile(pat).match